mypy

Temporarily allow CI failures for iOS (#142365) #18345

Job	Run time
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/clinic	20s
Run mypy on Tools/build	18s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	28s
Run mypy on Lib/tomllib	29s
Run mypy on Tools/peg_generator	20s
Run mypy on Lib/_pyrepl	19s
	2m 51s

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