Move temperature conversions to sensor base class (4/8) (#54472)

* Move temperature conversions to entity base class (4/8)

* Fix litterrobot sensor

* Fix tests

homeassistant/components/jewish_calendar/sensor.py

@@ -50,7 +50,7 @@ class JewishCalendarSensor(SensorEntity):
         self._holiday_attrs = {}
 
     @property
-    def state(self):
+    def native_value(self):
         """Return the state of the sensor."""
         if isinstance(self._state, datetime):
             return self._state.isoformat()
@@ -134,7 +134,7 @@ class JewishCalendarTimeSensor(JewishCalendarSensor):
     _attr_device_class = DEVICE_CLASS_TIMESTAMP
 
     @property
-    def state(self):
+    def native_value(self):
         """Return the state of the sensor."""
         if self._state is None:
             return None