Migrate APCUPSD to has entity name (#112997)

* Properly set entity names for APCUPSD

* Add test cases to prevent future regressions

* Fix tests due to the updated entity IDs

* Prettify code

* Remove redundant translation key

homeassistant/components/apcupsd/binary_sensor.py

@@ -20,7 +20,6 @@ from .coordinator import APCUPSdCoordinator
 _LOGGER = logging.getLogger(__name__)
 _DESCRIPTION = BinarySensorEntityDescription(
     key="statflag",
-    name="UPS Online Status",
     translation_key="online_status",
 )
 # The bit in STATFLAG that indicates the online status of the APC UPS.
@@ -46,6 +45,8 @@ async def async_setup_entry(
 class OnlineStatus(CoordinatorEntity[APCUPSdCoordinator], BinarySensorEntity):
     """Representation of a UPS online status."""
 
+    _attr_has_entity_name = True
+
     def __init__(
         self,
         coordinator: APCUPSdCoordinator,