Plugwise

- Update `_last_used_schedule()`: provide the collected schedules as input in order to find the last-modified valid schedule.
- `_rule_ids_by_x()`: replace None by NONE, allowing for simpler typing.
- Remove `schedule_temperature` from output: for Adam the schedule temperature cannot be collected when a schedule is not active.
- Simplify `_schedules()`, don't collect the schedule-details as no longer required.
- Improve solution for plugwise-beta issue 276
- Move HA Core input-checks into the backend library (into set_schedule_state() and set_preset())

- [276](https://github.com/plugwise/plugwise-beta/issues/276)

- Smile: adapt to HA Core platform-changes

- Set minimal required version of Home Assistant core to 2021.9.0
- Stick: adapt to HA Core 2021.9 sensor-changes (Remove last_reset, use total_increasing instead) fixes issue 204

- Link to plugwise module [v0.14.5](https://github.com/plugwise/python-plugwise/releases/tag/v0.14.5)
- Smile: fully use the HA Core DataUpdateCoordinator, providing the smile-data in coordinator.data
- Smile: change state_class to "total" for interval- and net_cumulative sensors, remove all remnants of the last_reset-related code

- Fix [277](https://github.com/plugwise/plugwise-beta/issues/277)
- Improve incorrect test-case validation