mypy

gh-143635: Fix crash in `ga_repr_items_list` (#143670) #19124

Job	Run time
Run mypy on Lib/tomllib	17s
Run mypy on Lib/test/libregrtest	24s
Run mypy on Tools/clinic	19s
Run mypy on Tools/jit	22s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/peg_generator	17s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/build	18s
	2m 50s

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