mypy

gh-141172: Update to wasi-sdk-29 (GH-141684) #18056

Job	Run time
Run mypy on Tools/peg_generator	20s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/build	24s
Run mypy on Lib/tomllib	16s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/clinic	17s
Run mypy on Tools/jit	24s
Run mypy on Lib/test/libregrtest	16s
	2m 33s

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