Apply federation check for /publicRooms with filter list (#7367)

changelog.d/7367.bugfix

@@ -0,0 +1 @@
+Prevent non-federating rooms from appearing in responses to federated `POST /publicRoom` requests when a filter was included.

synapse/handlers/room_list.py

@@ -90,7 +90,11 @@ class RoomListHandler(BaseHandler):
             logger.info("Bypassing cache as search request.")
 
             return self._get_public_room_list(
-                limit, since_token, search_filter, network_tuple=network_tuple
+                limit,
+                since_token,
+                search_filter,
+                network_tuple=network_tuple,
+                from_federation=from_federation,
             )
 
         key = (limit, since_token, network_tuple)