stages/authenticator_*: fix Permission Error when disabling Authenticator as non-superuser

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/core/api/propertymappings.py

@@ -78,7 +78,7 @@ class PropertyMappingViewSet(
     filterset_fields = {"managed": ["isnull"]}
     ordering = ["name"]
 
-    def get_queryset(self):
+    def get_queryset(self):  # pragma: no cover
         return PropertyMapping.objects.select_subclasses()
 
     @swagger_auto_schema(responses={200: TypeCreateSerializer(many=True)})