Do not include rooms with an unknown room version in a sync response. (#10644)

A user will still see this room if it is in a local cache, but it will
not reappear if clearing the cache and reloading.

tests/replication/slave/storage/test_events.py

@@ -150,6 +150,7 @@ class SlavedEventStoreTestCase(BaseSlavedStoreTestCase):
                     "invite",
                     event.event_id,
                     event.internal_metadata.stream_ordering,
+                    RoomVersions.V1.identifier,
                 )
             ],
         )