Add LOAD_METHOD_TYPE

[tekknolagi]

Add tests.

[github-actions]

{
  "django_minimal_requests": {
    "benchmark": "django_minimal_requests",
    "cg_instructions before": 681931,
    "cg_instructions now": 676659,
    "cg_instructions ∆": "-0.8%",
    "interpreter_args": [],
    "interpreter_name": "pyro",
    "version before": "9da20009550056922a7a299febe904f092273e55",
    "version now": "d4ab1b23df85daa47f205c380db04f6a6de72159"
  }
}

[github-actions]

Summary

Metric	Average	Best	Worst	Notes
cg_instructions	-0.1%	go -0.9%	bench_pickle 0.0%	typically < 0.2% noise

Benchmark details

Base vs. New

benchmark	cg_instructions
2to3	-0.4%
bench_base64	-0.0%
bench_compile	-0.1%
bench_pickle	0.0%
deltablue	-0.0%
fannkuch	-0.0%
go	-0.9%
loadproperty	-0.0%
nbody	-0.0%
nqueens	-0.0%
pyflate	-0.0%
pystone	-0.0%
richards	-0.0%

CPython vs New

benchmark	cg_instructions
2to3	-11.2%
bench_base64	-40.2%
bench_compile	1073.1%
bench_pickle	-27.9%
deltablue	-65.2%
fannkuch	-3.5%
go	-64.9%
loadproperty	-75.6%
nbody	20.7%
nqueens	25.5%
pyflate	-33.8%
pystone	-73.9%
richards	-80.1%

Base

benchmark	cg_instructions
2to3	2,287,407,269
bench_base64	2,882,264,381
bench_compile	2,905,297,968
bench_pickle	2,985,919,605
deltablue	1,430,180,622
fannkuch	5,397,318,583
go	1,864,219,066
loadproperty	427,272,550
nbody	9,408,434,989
nqueens	2,776,550,656
pyflate	9,583,534,536
pystone	1,038,533,432
richards	957,216,458

New

benchmark	cg_instructions
2to3	2,277,460,620
bench_base64	2,882,226,177
bench_compile	2,901,892,499
bench_pickle	2,986,230,185
deltablue	1,429,703,713
fannkuch	5,397,275,436
go	1,847,923,819
loadproperty	427,225,938
nbody	9,408,385,603
nqueens	2,776,502,139
pyflate	9,583,469,303
pystone	1,038,480,236
richards	957,150,600

CPython

benchmark	cg_instructions
2to3	2,563,594,775
bench_base64	4,820,239,036
bench_compile	247,364,850
bench_pickle	4,143,854,829
deltablue	4,109,340,267
fannkuch	5,594,144,686
go	5,267,460,686
loadproperty	1,747,769,482
nbody	7,793,857,569
nqueens	2,213,172,444
pyflate	14,468,019,638
pystone	3,981,578,921
richards	4,821,556,155