Disable push rule evaluation for rooms excluded from sync (#15361)

* no push for excluded room from sync

* add changelog
Signed-off-by: Maghen Calinghee <maghen.calinghee@beta.gouv.fr>

* correct changelog

Author: mcalinghee

changelog.d/15361.bugfix

@@ -0,0 +1 @@
+Disable push rule evaluation for rooms excluded from sync.

synapse/push/bulk_push_rule_evaluator.py

@@ -326,6 +326,7 @@ async def _action_for_event_by_user(
         if (
             not event.internal_metadata.is_notifiable()
             or event.internal_metadata.is_historical()
+            or event.room_id in self.hs.config.server.rooms_to_exclude_from_sync
         ):
             # Push rules for events that aren't notifiable can't be processed by this and
             # we want to skip push notification actions for historical messages