mypy

gh-141510: Optimize frozendict(frozendict) (#145592) #19834

Job	Run time
Run mypy on Lib/tomllib	16s
Run mypy on Lib/test/libregrtest	24s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/build	18s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/clinic	18s
Run mypy on Tools/peg_generator	21s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/jit	22s
	2m 51s

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