mypy

gh-122255: Synchronize warnings in C and Python implementations of th… #17951

Job	Run time
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/build	17s
Run mypy on Lib/_pyrepl	21s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/clinic	19s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	25s
Run mypy on Tools/jit	23s
	2m 39s

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