mypy

gh-149392: Add "Open Input in Editor" support in PyREPL #21134

Job	Run time
Run mypy on Lib/test/libregrtest	25s
Run mypy on Tools/jit	14s
Run mypy on Lib/tomllib	17s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/clinic	14s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/peg_generator	16s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/build	16s
	2m 34s

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