Always notify replication when a stream advances (#14877)

This ensures that all other workers are told about stream updates in a timely manner, without having to remember to manually poke replication.

tests/module_api/test_api.py

@@ -404,6 +404,9 @@ class ModuleApiTestCase(HomeserverTestCase):
             self.module_api.send_local_online_presence_to([remote_user_id])
         )
 
+        # We don't always send out federation immediately, so we advance the clock.
+        self.reactor.advance(1000)
+
         # Check that a presence update was sent as part of a federation transaction
         found_update = False
         calls = (