mypy

gh-137586: Open external osascript program with absolute path (GH-137… #10392

Job	Run time
Run mypy on Tools/build	21s
Run mypy on Tools/cases_generator	21s
Run mypy on Lib/_pyrepl	24s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/test/libregrtest	21s
Run mypy on Tools/clinic	18s
Run mypy on Tools/jit	19s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Lib/tomllib	15s
	2m 56s

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