mypy

gh-139373: Fix asyncio Process.communicate() losing output when cance… #22698

Job	Run time
Run mypy on Lib/_pyrepl	31s
Run mypy on Tools/check-c-api-docs	32s
Run mypy on Tools/cases_generator	32s
Run mypy on Lib/test/libregrtest	32s
Run mypy on Tools/peg_generator	34s
Run mypy on Tools/build	30s
Run mypy on Tools/clinic	31s
Run mypy on Lib/tomllib	31s
Run mypy on Tools/jit	30s
	4m 43s

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