mypy

gh-138122: Add inverted flamegraph (#142288) #18457

Job	Run time
Run mypy on Lib/test/libregrtest	18s
Run mypy on Tools/cases_generator	19s
Run mypy on Lib/tomllib	19s
Run mypy on Tools/build	20s
Run mypy on Tools/jit	22s
Run mypy on Tools/clinic	19s
Run mypy on Tools/peg_generator	15s
Run mypy on Lib/_pyrepl	18s
	2m 30s

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