Fix up mypy errors after mypy enhancement upstream #8930

Job	Run time
Flake8	13s
pydocstyle	11s
Documentation	4m 45s
Emirge installation (ubuntu-latest)	5m 14s
Examples (ubuntu-latest)	6m 3s
Emirge installation (macos-latest)	6m 5s
Examples (porter)	1s
Mypy	4m 12s
Production testing (ubuntu-latest)	4m 40s
Production testing (macos-latest)	4m 55s
Pylint	4m 15s
Pytest	6m 2s
Production testing (porter)	1s
	46m 37s

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