mypy

gh-151941: Fix Sphinx reference warnings in `Doc/c-api/` (GH-152044) #22839

Job	Run time
Run mypy on Tools/clinic	21s
Run mypy on Tools/build	12s
Run mypy on Tools/cases_generator	22s
Run mypy on Lib/_pyrepl	17s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/check-c-api-docs	21s
Run mypy on Tools/jit	19s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/tomllib	20s
	2m 51s

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