mypy

gh-149537: Remove kw parameters from python version of `reduce` (#149… #21239

Job	Run time
Run mypy on Tools/cases_generator	30s
Run mypy on Tools/peg_generator	29s
Run mypy on Lib/test/libregrtest	36s
Run mypy on Lib/_pyrepl	33s
Run mypy on Tools/clinic	32s
Run mypy on Tools/check-c-api-docs	24s
Run mypy on Tools/build	35s
Run mypy on Tools/jit	27s
Run mypy on Lib/tomllib	45s
	4m 51s

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