mypy

gh-138122: Tachyon heatmap: Make toggle switches keyboard accessible … #18450

Job	Run time
Run mypy on Tools/clinic	19s
Run mypy on Tools/jit	17s
Run mypy on Lib/tomllib	23s
Run mypy on Lib/_pyrepl	30s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/build	19s
	2m 47s

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