mypy

gh-149481: skip `FOR_ITER` inline specialization for Python `next… #21223

Job	Run time
Run mypy on Tools/build	34s
Run mypy on Tools/jit	32s
Run mypy on Lib/test/libregrtest	34s
Run mypy on Tools/check-c-api-docs	23s
Run mypy on Tools/cases_generator	30s
Run mypy on Lib/tomllib	24s
Run mypy on Tools/peg_generator	27s
Run mypy on Lib/_pyrepl	39s
Run mypy on Tools/clinic	33s
	4m 36s

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