* Propagate timezone setting to host in OS 16.2 and newer
With home-assistant/operating-system#4224, timezone setting in OS can be
peristently set in HAOS as well. Propagate the timezone configured in
Supervisor config (which can be changed through general system settings
in HA Core) through the DBus API for setting the timezone.
* Persist timezone also when it's been obtained from Whoami
* Suppress pylint fixme error