mypy

gh-146553: Fix infinite loop in typing.get_type_hints() on circular _… #20832

Job	Run time
Run mypy on Tools/build	22s
Run mypy on Tools/peg_generator	23s
Run mypy on Tools/cases_generator	17s
Run mypy on Lib/_pyrepl	19s
Run mypy on Lib/tomllib	23s
Run mypy on Tools/jit	23s
Run mypy on Tools/clinic	17s
Run mypy on Tools/check-c-api-docs	30s
Run mypy on Lib/test/libregrtest	21s
	3m 15s

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