Add water_heater_mode to case #6232

Job	Run time
Shellcheck	4s
Dependency	6s
Cache identify	6s
Prepare	10s
Ruff check and force	8s
Check commit	0s
Run pytest using Python ${{ matrix.python-version }}	0s
Run mypy	0s
Process test coverage	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	0s
Process test complexity	0s
	34s

Provide feedback