mypy

gh-142830: prevent some crashes when mutating `sqlite3` callbacks (#1… #10012

Job	Run time
Run mypy on Tools/cases_generator	18s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/clinic	17s
Run mypy on Tools/jit	18s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/build	17s
Run mypy on Lib/test/libregrtest	20s
	2m 42s

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