mypy

gh-141004: Don't trigger `run-tests` when `Tools/check-c-api-docs/ignored_c_api.txt` is changed #18959

Job	Run time
Run mypy on Tools/check-c-api-docs	16s
Run mypy on Tools/cases_generator	16s
Run mypy on Lib/tomllib	27s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/build	19s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/jit	16s
Run mypy on Tools/peg_generator	22s
Run mypy on Tools/clinic	16s
	2m 52s

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