Fix Homematic IP Cloud configuration (#21202)

`homematicip.aio.auth.isRequestAcknowledged` returns false if the
request failed in stead of raising an error.

See coreGreenberet/homematicip-rest-api@0b61954f6a

Closes: #20428

homeassistant/components/homematicip_cloud/hap.py

@@ -39,8 +39,7 @@ class HomematicipAuth:
         from homematicip.base.base_connection import HmipConnectionError
 
         try:
-            await self.auth.isRequestAcknowledged()
-            return True
+            return await self.auth.isRequestAcknowledged()
         except HmipConnectionError:
             return False
 

tests/components/homematicip_cloud/test_hap.py

@@ -44,7 +44,7 @@ async def test_auth_auth_check_and_register(hass):
     hap = hmipc.HomematicipAuth(hass, config)
     hap.auth = Mock()
     with patch.object(hap.auth, 'isRequestAcknowledged',
-                      return_value=mock_coro()), \
+                      return_value=mock_coro(True)), \
             patch.object(hap.auth, 'requestAuthToken',
                          return_value=mock_coro('ABC')), \
             patch.object(hap.auth, 'confirmAuthToken',