Prevent unwanted directories to be installed as Python packages #9598

Job	Run time
(util) Check if should run	5s
Run tests from site-packages (non-editable) installation (pip-default/linux)	26m 57s
pytest (py3.8/linux/integration)	15m 52s
Run tests from site-packages (non-editable) installation (pip-complete/linux)	29m 36s
Run examples (py3.8/linux)	9m 25s
pytest (py3.8/win64/integration)	34m 4s
Run tests from site-packages (non-editable) installation (pip-all/linux)	31m 9s
Run examples (py3.8/win64)	21m 32s
pytest (py3.9/linux/integration)	15m 58s
Run tests from site-packages (non-editable) installation (conda-like/linux)	28m 22s
Run examples (py3.9/linux)	8m 54s
pytest (py3.9/win64/integration)	30m 42s
Run examples (py3.9/win64)	21m 22s
pytest (py3.10/linux/integration)	14m 43s
Run examples (py3.10/linux)	8m 41s
pytest (py3.10/win64/integration)	31m 9s
Run examples (py3.10/win64)	22m 15s
pytest (py3.11/linux/integration)	13m 22s
Run examples (py3.11/linux)	7m 12s
pytest (py3.11/win64/integration)	26m 14s
Run examples (py3.11/win64)	18m 4s
	6h 55m 38s

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