Remove nonlinearsolve as a dep by just using the default nonlinearsolve

[ChrisRackauckas]

Should greatly improve load times when it's not needed.

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	272f68a...	master / 272f68a...
ODEProblem	0.0833 ± 0.0049 s	0.0832 ± 0.0047 s	1 ± 0.082
init	0.0577 ± 0.012 ms	0.057 ± 0.012 ms	1.01 ± 0.31
large_parameter_init/ODEProblem	0.742 ± 0.027 s	0.755 ± 0.017 s	0.983 ± 0.042
large_parameter_init/init	0.101 ± 0.013 ms	0.101 ± 0.012 ms	0.996 ± 0.17
mtkcompile	0.0354 ± 0.0012 s	0.0355 ± 0.0016 s	0.997 ± 0.056
time_to_load	5.95 ± 0.023 s	5.07 ± 0.012 s	1.17 ± 0.0053

Memory benchmarks

	master	272f68a...	master / 272f68a...
ODEProblem	0.579 M allocs: 18.9 MB	0.578 M allocs: 18.8 MB	1
init	0.815 k allocs: 0.0318 MB	0.815 k allocs: 0.0318 MB	1
large_parameter_init/ODEProblem	4.68 M allocs: 0.169 GB	4.68 M allocs: 0.169 GB	0.999
large_parameter_init/init	1.66 k allocs: 0.0712 MB	1.66 k allocs: 0.0712 MB	1
mtkcompile	0.233 M allocs: 8.08 MB	0.232 M allocs: 8.08 MB	1
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1

[github-actions]

Benchmark Results (Julia vlts)

Time benchmarks

	master	272f68a...	master / 272f68a...
ODEProblem	0.0846 ± 0.0063 s	0.0825 ± 0.0062 s	1.03 ± 0.11
init	0.0608 ± 0.0016 ms	0.0606 ± 0.0016 ms	1 ± 0.037
large_parameter_init/ODEProblem	0.71 ± 0.011 s	0.707 ± 0.0073 s	1 ± 0.018
large_parameter_init/init	0.112 ± 0.0026 ms	0.112 ± 0.0024 ms	0.998 ± 0.032
mtkcompile	0.0361 ± 0.0014 s	0.0345 ± 0.00073 s	1.05 ± 0.046
time_to_load	5.65 ± 0.094 s	4.82 ± 0.038 s	1.17 ± 0.022

Memory benchmarks

	master	272f68a...	master / 272f68a...
ODEProblem	0.588 M allocs: 20 MB	0.588 M allocs: 20 MB	1
init	0.908 k allocs: 0.0479 MB	0.908 k allocs: 0.0479 MB	1
large_parameter_init/ODEProblem	4.61 M allocs: 0.177 GB	4.63 M allocs: 0.178 GB	0.991
large_parameter_init/init	1.75 k allocs: 0.0874 MB	1.75 k allocs: 0.0874 MB	1
mtkcompile	0.233 M allocs: 8.65 MB	0.233 M allocs: 8.63 MB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1