vulkan: Add ACC_TYPE_VEC2 implementation

[SavicStefan]

This PR adds the implementation for ACC_TYPE_VEC2. This change, with non-coopmat shaders, using ACC_TYPE_VEC2 improves caching behavior, as accessing 32-bit values is generally more efficient than accessing 16-bit values.

Performance Comparison (Without coopmat and coopmat2) NVIDIA GeForce RTX 4060 Ti

Name	Before (us/run)	After (us/run)	Δ% (Improvement)
MUL_MAT(type_a=f32,type_b=f32,m=4096,n=512,k=14336)	5767.64	5479.83	+4.99%
MUL_MAT(type_a=f16,type_b=f32,m=4096,n=512,k=14336)	5421.40	5047.91	+6.88%
MUL_MAT(type_a=bf16,type_b=f32,m=4096,n=512,k=14336)	5281.02	6002.14	−13.66%
MUL_MAT(type_a=q4_0,type_b=f32,m=4096,n=512,k=14336)	2741.43	2748.71	−0.27%
MUL_MAT(type_a=q4_1,type_b=f32,m=4096,n=512,k=14336)	2766.60	2764.23	+0.09%
MUL_MAT(type_a=q5_0,type_b=f32,m=4096,n=512,k=14336)	2877.49	2875.25	+0.08%
MUL_MAT(type_a=q5_1,type_b=f32,m=4096,n=512,k=14336)	2869.17	2867.33	+0.06%
MUL_MAT(type_a=q8_0,type_b=f32,m=4096,n=512,k=14336)	2887.17	2890.27	−0.11%
MUL_MAT(type_a=mxfp4,type_b=f32,m=4096,n=512,k=14336)	4976.57	4043.75	+18.75%
MUL_MAT(type_a=q2_K,type_b=f32,m=4096,n=512,k=14336)	4938.25	4120.32	+16.56%
MUL_MAT(type_a=q3_K,type_b=f32,m=4096,n=512,k=14336)	5287.85	4548.30	+13.99%
MUL_MAT(type_a=q4_K,type_b=f32,m=4096,n=512,k=14336)	5373.34	4566.63	+15.01%
MUL_MAT(type_a=q5_K,type_b=f32,m=4096,n=512,k=14336)	5769.13	4907.47	+14.94%
MUL_MAT(type_a=q6_K,type_b=f32,m=4096,n=512,k=14336)	5507.98	4524.96	+17.85%
MUL_MAT(type_a=iq2_xxs,type_b=f32,m=4096,n=512,k=14336)	4877.02	4043.75	+17.07%
MUL_MAT(type_a=iq2_xs,type_b=f32,m=4096,n=512,k=14336)	5010.98	4112.35	+17.94%
MUL_MAT(type_a=iq2_s,type_b=f32,m=4096,n=512,k=14336)	4863.99	4065.67	+16.41%
MUL_MAT(type_a=iq3_xxs,type_b=f32,m=4096,n=512,k=14336)	4957.83	4129.54	+16.70%
MUL_MAT(type_a=iq1_s,type_b=f32,m=4096,n=512,k=14336)	4583.30	3788.42	+17.34%
MUL_MAT(type_a=iq1_m,type_b=f32,m=4096,n=512,k=14336)	5128.29	4280.64	+16.52%
MUL_MAT(type_a=iq4_nl,type_b=f32,m=4096,n=512,k=14336)	4885.91	3992.67	+18.27%
MUL_MAT(type_a=iq3_s,type_b=f32,m=4096,n=512,k=14336)	4933.56	4084.30	+17.22%
MUL_MAT(type_a=iq4_xs,type_b=f32,m=4096,n=512,k=14336)	5389.60	4489.23	+16.67%

Performance before(Without coopmat and coopmat2) NVIDIA GeForce RTX 4060 Ti

MUL_MAT(type_a=f32,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                   174 runs -  5767.64 us/run -  60.13 GFLOP/run -  10.43 TFLOPS
MUL_MAT(type_a=f16,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                   186 runs -  5421.40 us/run -  60.13 GFLOP/run -  11.09 TFLOPS
MUL_MAT(type_a=bf16,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  190 runs -  5281.02 us/run -  60.13 GFLOP/run -  11.39 TFLOPS
MUL_MAT(type_a=q4_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  366 runs -  2741.43 us/run -  60.13 GFLOP/run -  21.93 TFLOPS
MUL_MAT(type_a=q4_1,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  362 runs -  2766.60 us/run -  60.13 GFLOP/run -  21.73 TFLOPS
MUL_MAT(type_a=q5_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  348 runs -  2877.49 us/run -  60.13 GFLOP/run -  20.90 TFLOPS
MUL_MAT(type_a=q5_1,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  350 runs -  2869.17 us/run -  60.13 GFLOP/run -  20.96 TFLOPS
MUL_MAT(type_a=q8_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  348 runs -  2887.17 us/run -  60.13 GFLOP/run -  20.83 TFLOPS
MUL_MAT(type_a=mxfp4,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 202 runs -  4976.57 us/run -  60.13 GFLOP/run -  12.08 TFLOPS
MUL_MAT(type_a=q2_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  204 runs -  4938.25 us/run -  60.13 GFLOP/run -  12.18 TFLOPS
MUL_MAT(type_a=q3_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  190 runs -  5287.85 us/run -  60.13 GFLOP/run -  11.37 TFLOPS
MUL_MAT(type_a=q4_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  188 runs -  5373.34 us/run -  60.13 GFLOP/run -  11.19 TFLOPS
MUL_MAT(type_a=q5_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  174 runs -  5769.13 us/run -  60.13 GFLOP/run -  10.42 TFLOPS
MUL_MAT(type_a=q6_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  182 runs -  5507.98 us/run -  60.13 GFLOP/run -  10.92 TFLOPS
MUL_MAT(type_a=iq2_xxs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):               206 runs -  4877.02 us/run -  60.13 GFLOP/run -  12.33 TFLOPS
MUL_MAT(type_a=iq2_xs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                200 runs -  5010.98 us/run -  60.13 GFLOP/run -  12.00 TFLOPS
MUL_MAT(type_a=iq2_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 206 runs -  4863.99 us/run -  60.13 GFLOP/run -  12.36 TFLOPS
MUL_MAT(type_a=iq3_xxs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):               202 runs -  4957.83 us/run -  60.13 GFLOP/run -  12.13 TFLOPS
MUL_MAT(type_a=iq1_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 220 runs -  4583.30 us/run -  60.13 GFLOP/run -  13.12 TFLOPS
MUL_MAT(type_a=iq1_m,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 196 runs -  5128.29 us/run -  60.13 GFLOP/run -  11.73 TFLOPS
MUL_MAT(type_a=iq4_nl,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                206 runs -  4885.91 us/run -  60.13 GFLOP/run -  12.31 TFLOPS
MUL_MAT(type_a=iq3_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 204 runs -  4933.56 us/run -  60.13 GFLOP/run -  12.19 TFLOPS
MUL_MAT(type_a=iq4_xs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                186 runs -  5389.60 us/run -  60.13 GFLOP/run -  11.16 TFLOPS

Performance after(Without coopmat and coopmat2) NVIDIA GeForce RTX 4060 Ti

MUL_MAT(type_a=f32,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                   184 runs -  5479.83 us/run -  60.13 GFLOP/run -  10.97 TFLOPS
MUL_MAT(type_a=f16,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                   200 runs -  5047.91 us/run -  60.13 GFLOP/run -  11.91 TFLOPS
MUL_MAT(type_a=bf16,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  168 runs -  6002.14 us/run -  60.13 GFLOP/run -  10.02 TFLOPS
MUL_MAT(type_a=q4_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  364 runs -  2748.71 us/run -  60.13 GFLOP/run -  21.88 TFLOPS
MUL_MAT(type_a=q4_1,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  362 runs -  2764.23 us/run -  60.13 GFLOP/run -  21.75 TFLOPS
MUL_MAT(type_a=q5_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  348 runs -  2875.25 us/run -  60.13 GFLOP/run -  20.91 TFLOPS
MUL_MAT(type_a=q5_1,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  350 runs -  2867.33 us/run -  60.13 GFLOP/run -  20.97 TFLOPS
MUL_MAT(type_a=q8_0,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  348 runs -  2890.27 us/run -  60.13 GFLOP/run -  20.80 TFLOPS
MUL_MAT(type_a=mxfp4,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 248 runs -  4043.75 us/run -  60.13 GFLOP/run -  14.87 TFLOPS
MUL_MAT(type_a=q2_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  244 runs -  4120.32 us/run -  60.13 GFLOP/run -  14.59 TFLOPS
MUL_MAT(type_a=q3_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  220 runs -  4548.30 us/run -  60.13 GFLOP/run -  13.22 TFLOPS
MUL_MAT(type_a=q4_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  220 runs -  4566.63 us/run -  60.13 GFLOP/run -  13.17 TFLOPS
MUL_MAT(type_a=q5_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  204 runs -  4907.47 us/run -  60.13 GFLOP/run -  12.25 TFLOPS
MUL_MAT(type_a=q6_K,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                  222 runs -  4524.96 us/run -  60.13 GFLOP/run -  13.29 TFLOPS
MUL_MAT(type_a=iq2_xxs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):               248 runs -  4043.75 us/run -  60.13 GFLOP/run -  14.87 TFLOPS
MUL_MAT(type_a=iq2_xs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                244 runs -  4112.35 us/run -  60.13 GFLOP/run -  14.62 TFLOPS
MUL_MAT(type_a=iq2_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 246 runs -  4065.67 us/run -  60.13 GFLOP/run -  14.79 TFLOPS
MUL_MAT(type_a=iq3_xxs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):               244 runs -  4129.54 us/run -  60.13 GFLOP/run -  14.56 TFLOPS
MUL_MAT(type_a=iq1_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 264 runs -  3788.42 us/run -  60.13 GFLOP/run -  15.87 TFLOPS
MUL_MAT(type_a=iq1_m,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 234 runs -  4280.64 us/run -  60.13 GFLOP/run -  14.05 TFLOPS
MUL_MAT(type_a=iq4_nl,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                252 runs -  3992.67 us/run -  60.13 GFLOP/run -  15.06 TFLOPS
MUL_MAT(type_a=iq3_s,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                 246 runs -  4084.30 us/run -  60.13 GFLOP/run -  14.72 TFLOPS
MUL_MAT(type_a=iq4_xs,type_b=f32,m=4096,n=512,k=14336,bs=[1,1],nr=[1,1],per=[0,1,2,3],v=0,o=1):                224 runs -  4489.23 us/run -  60.13 GFLOP/run -  13.39 TFLOPS