mypy

gh-153494: Encode imaplib search criteria to the declared CHARSET (GH… #22441

Job	Run time
Run mypy on Tools/peg_generator	40s
Run mypy on Tools/check-c-api-docs	33s
Run mypy on Lib/_pyrepl	37s
Run mypy on Lib/tomllib	38s
Run mypy on Tools/jit	35s
Run mypy on Tools/build	32s
Run mypy on Tools/cases_generator	33s
Run mypy on Tools/clinic	36s
Run mypy on Lib/test/libregrtest	33s
	5m 17s

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