Update expected DB query count when creating a room (#13307)

changelog.d/13307.misc

@@ -0,0 +1 @@
+Don't pull out the full state when creating an event.

tests/rest/client/test_rooms.py

@@ -710,7 +710,7 @@ class RoomsCreateTestCase(RoomBase):
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertTrue("room_id" in channel.json_body)
         assert channel.resource_usage is not None
-        self.assertEqual(36, channel.resource_usage.db_txn_count)
+        self.assertEqual(43, channel.resource_usage.db_txn_count)
 
     def test_post_room_initial_state(self) -> None:
         # POST with initial_state config key, expect new room id
@@ -723,7 +723,7 @@ class RoomsCreateTestCase(RoomBase):
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertTrue("room_id" in channel.json_body)
         assert channel.resource_usage is not None
-        self.assertEqual(40, channel.resource_usage.db_txn_count)
+        self.assertEqual(49, channel.resource_usage.db_txn_count)
 
     def test_post_room_visibility_key(self) -> None:
         # POST with visibility config key, expect new room id