mypy

gh-151284: Fix test_capi on UBSan (#151286) #21841

Job	Run time
Run mypy on Lib/_pyrepl	24s
Run mypy on Tools/check-c-api-docs	21s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/build	18s
Run mypy on Lib/tomllib	18s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/jit	22s
Run mypy on Tools/clinic	23s
Run mypy on Tools/cases_generator	23s
	3m 11s

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