mypy

gh-70039: smtplib: store the server name in ._host in .connect() (#11… #20533

Job	Run time
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Lib/_pyrepl	20s
Run mypy on Tools/clinic	18s
Run mypy on Lib/test/libregrtest	21s
Run mypy on Tools/jit	19s
Run mypy on Tools/peg_generator	20s
Run mypy on Lib/tomllib	19s
Run mypy on Tools/build	20s
Run mypy on Tools/cases_generator	17s
	2m 51s

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