mypy

Avoid TestNullDlsym hanging on HP-PA (#141011) #19291

Job	Run time
Run mypy on Tools/build	19s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/cases_generator	19s
Run mypy on Lib/_pyrepl	15s
Run mypy on Tools/jit	20s
Run mypy on Tools/clinic	20s
Run mypy on Lib/test/libregrtest	19s
Run mypy on Tools/check-c-api-docs	23s
	2m 50s

Provide feedback