Improve _set_groupswitch_member_state() functions as suggested #5610

Job	Run time
Shellcheck	4s
Dependency	6s
Cache identify	4s
Prepare	24s
Ruff check and force	15s
Check commit	0s
Run pytest using Python ${{ matrix.python-version }}	-1s
Run mypy	0s
Process test coverage	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test complexity	0s
	52s

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