mypy

gh-144492: Fix `process_changed_files` outputs for `reusable-{macos, wasi}.yml` #19400

Job	Run time
Run mypy on Tools/check-c-api-docs	21s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/clinic	19s
Run mypy on Lib/tomllib	21s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/build	19s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/jit	21s
Run mypy on Tools/peg_generator	19s
	3m 0s

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