mypy

gh-129805: Fix `bytes` annotation in `Tools/jit` #12184

Job	Run time
Run mypy on Lib/_pyrepl	18s
Run mypy on Lib/test/libregrtest	16s
Run mypy on Tools/build	17s
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/clinic	16s
Run mypy on Tools/jit	15s
Run mypy on Tools/peg_generator	15s
Run mypy on Tools/wasm	15s
	2m 10s

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