Reduce CI time #9142

Job	Run time
Flake8	19s
Examples (ubuntu-latest)	1h 1m 11s
Emirge installation (ubuntu-latest)	5m 20s
Examples (porter)	1h 41m 39s
Documentation	5m 5s
Emirge installation (macos-latest)	7m 26s
Mypy	3m 51s
Production testing (ubuntu-latest)	56m 10s
pydocstyle	13s
Production testing (macos-latest)	43m 20s
Pylint	4m 41s
Production testing (porter)	1h 5m 58s
Pytest	1h 9m 18s
	7h 4m 31s

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