mypy

GH-145667: Merge `GET_ITER` and `GET_YIELD_FROM_ITER` #20070

Job	Run time
Run mypy on Tools/peg_generator	18s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/build	18s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/jit	18s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/cases_generator	16s
Run mypy on Tools/clinic	17s
	2m 40s

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