mypy

gh-141510: Add frozendict support to python-gdb.py (#145511) #19791

Job	Run time
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/jit	21s
Run mypy on Tools/build	19s
Run mypy on Tools/clinic	12s
Run mypy on Tools/peg_generator	18s
Run mypy on Lib/_pyrepl	22s
Run mypy on Lib/tomllib	19s
Run mypy on Tools/check-c-api-docs	14s
	2m 45s

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