mypy

GH-145668: Add FOR_ITER specialization for virtual iterators. Special… #20756

Job	Run time
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/peg_generator	17s
Run mypy on Tools/build	19s
Run mypy on Lib/tomllib	18s
Run mypy on Tools/clinic	21s
Run mypy on Lib/test/libregrtest	21s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/jit	18s
Run mypy on Lib/_pyrepl	19s
	2m 48s

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