mypy

gh-146358: Fix warnings.catch_warnings on Free Threading (#146374) #10337

Job	Run time
Run mypy on Lib/_pyrepl	17s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/check-c-api-docs	16s
Run mypy on Tools/jit	18s
Run mypy on Tools/build	19s
Run mypy on Tools/clinic	19s
Run mypy on Lib/test/libregrtest	18s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/cases_generator	16s
	2m 38s

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