mypy

gh-149879: Fix test_termios and test_ioctl on Cygwin (#150412) #10599

Job	Run time
Run mypy on Lib/tomllib	16s
Run mypy on Tools/build	18s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/clinic	17s
Run mypy on Tools/cases_generator	21s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/jit	21s
Run mypy on Tools/peg_generator	20s
Run mypy on Lib/test/libregrtest	16s
	2m 44s

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