Move temperature conversions to sensor base class (6/8) (#54476)

* Move temperature conversions to entity base class (6/8)

* Fix tests

homeassistant/components/rflink/sensor.py

@@ -152,12 +152,12 @@ class RflinkSensor(RflinkDevice, SensorEntity):
             self.handle_event_callback(self._initial_event)
 
     @property
-    def unit_of_measurement(self):
+    def native_unit_of_measurement(self):
         """Return measurement unit."""
         return self._unit_of_measurement
 
     @property
-    def state(self):
+    def native_value(self):
         """Return value."""
         return self._state