Move temperature conversions to sensor base class (1/8) (#48261)

* Move temperature conversions to entity base class (1/8)

* Update integrations a-c

* Leave old temperature conversion until all integrations are migrated

* tweak

* Use contextlib.suppress

* Remove the MeasurableUnitEntity mixin

* Address comments, add tests

* Fix f-string

* Drop deprecation warning from base entity class

* Update with _attr-shorthand

* Fix rebase mistakes

* Fix additional rebase mistakes

* Only report temperature conversion once

* Fix additional rebase mistakes

* Format homeassistant/components/bbox/sensor.py

* Fix check for overidden _attr_state

* Remove test workarounds from implementation

* Remove useless None-check

* Tweaks

* Migrate new sensors a-c

* Update climacell

* Push deprecation of temperature conversion forward

* Override __repr__ in SensorEntity

* Include native_value in SensorEntity attributes

* Pylint

* Black

* Black

* Fix rebase mistakes

* black

* Fix rebase mistakes

* Revert changes in august/sensor.py

* Revert handling of unit converted restored state

* Apply code review suggestion

* Fix arlo test

homeassistant/components/arwn/sensor.py

@@ -138,7 +138,7 @@ class ArwnSensor(SensorEntity):
         # This mqtt topic for the sensor which is its uid
         self._attr_unique_id = topic
         self._state_key = state_key
-        self._attr_unit_of_measurement = units
+        self._attr_native_unit_of_measurement = units
         self._attr_icon = icon
         self._attr_device_class = device_class
 
@@ -147,5 +147,5 @@ class ArwnSensor(SensorEntity):
         ev = {}
         ev.update(event)
         self._attr_extra_state_attributes = ev
-        self._attr_state = ev.get(self._state_key, None)
+        self._attr_native_value = ev.get(self._state_key, None)
         self.async_write_ha_state()