mypy

gh-124621: Emscripten: Fix regression in use-after-close error handli… #9391

Job	Run time
Run mypy on Lib/tomllib	20s
Run mypy on Lib/test/libregrtest	18s
Run mypy on Lib/_pyrepl	16s
Run mypy on Tools/build	20s
Run mypy on Tools/clinic	20s
Run mypy on Tools/jit	20s
Run mypy on Tools/cases_generator	15s
Run mypy on Tools/peg_generator	11s
	2m 20s

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