mypy

gh-97032: avoid test_squeezer crash on macOS buildbots (gh-115508) (G… #20637

Job	Run time
Run mypy on Lib/_pyrepl	18s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/jit	19s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/check-c-api-docs	16s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Tools/build	20s
Run mypy on Tools/clinic	20s
Run mypy on Tools/peg_generator	17s
	2m 41s

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