mypy

gh-141510: Update specializer to support frozendict (gh-144949) #19582

Job	Run time
Run mypy on Tools/jit	22s
Run mypy on Tools/clinic	16s
Run mypy on Lib/tomllib	16s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/build	18s
Run mypy on Tools/check-c-api-docs	19s
Run mypy on Lib/_pyrepl	23s
Run mypy on Lib/test/libregrtest	20s
	2m 50s

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