Limit log spam from rest and include reason in platform retry (#48666)

- Each retry was logging the error again
- Now we set the cause of the PlatformNotReady to allow Home Assistant to log as needed

homeassistant/components/rest/sensor.py

@@ -50,9 +50,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
         conf = config
         coordinator = None
         rest = create_rest_data_from_config(hass, conf)
-        await rest.async_update()
+        await rest.async_update(log_errors=False)
 
     if rest.data is None:
+        if rest.last_exception:
+            raise PlatformNotReady from rest.last_exception
         raise PlatformNotReady
 
     name = conf.get(CONF_NAME)