mypy

gh-149189: Modern defaults for `pprint` (#149190) #21155

Job	Run time
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/build	18s
Run mypy on Lib/tomllib	20s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/clinic	16s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/peg_generator	13s
Run mypy on Tools/jit	15s
Run mypy on Tools/cases_generator	18s
	2m 34s

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