mypy

gh-146558: JIT optimize dict access for objects with known hash (#146… #20267

Job	Run time
Run mypy on Tools/build	19s
Run mypy on Tools/cases_generator	27s
Run mypy on Tools/clinic	19s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/jit	16s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/_pyrepl	23s
	2m 55s

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