More return hints #1645

Job	Run time
ruff-sort-imports	11s
ruff-check	10s
mypy	8s
pyiron / test-alternate-env	1m 14s
pyiron / commit-updated-env	10s
pyiron / black	8s
pyiron / build-docs	1m 28s
pyiron / benchmark-tests	56s
pyiron / build-notebooks	1m 30s
pyiron / pip-check	1m 2s
pyiron / unit-tests (ubuntu-22.04, 3.12)	1m 10s
pyiron / unit-tests (ubuntu-22.04, 3.11)	1m 10s
pyiron / unit-tests (ubuntu-22.04, 3.10)	1m 23s
pyiron / unit-tests (windows-latest, 3.12)	6m 21s
pyiron / unit-tests (macos-latest, 3.12)	2m 43s
pyiron / coveralls-and-codacy / Tests-and-Coverage	2m 10s
	21m 54s

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