mypy

GH-139109: Support switch/case dispatch with the tracing interpreter.… #18025

Job	Run time
Run mypy on Lib/_pyrepl	17s
Run mypy on Tools/cases_generator	14s
Run mypy on Tools/jit	17s
Run mypy on Lib/test/libregrtest	28s
Run mypy on Tools/clinic	19s
Run mypy on Tools/build	19s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/tomllib	19s
	2m 32s

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