mypy

Docs: add cross-references to improve navigation in `getpass.rst` (#1… #21788

Job	Run time
Run mypy on Lib/tomllib	21s
Run mypy on Tools/build	21s
Run mypy on Tools/peg_generator	35s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/clinic	21s
Run mypy on Tools/jit	41s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/test/libregrtest	20s
	3m 34s

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