Fix exception trying to display moved table warnings (apache#23837)

If you still have an old dangling table from the 2.2 migration this
would fail. Make it more resilient and cope with both styles of moved
table name

airflow/www/views.py

@@ -835,7 +835,7 @@ def _iter_parsed_moved_data_table_names():
                 if segments[0] != settings.AIRFLOW_MOVED_TABLE_PREFIX:
                     continue
                 # Second segment is a version marker that we don't need to show.
-                yield segments[3], table_name
+                yield segments[-1], table_name
 
         if (
             permissions.ACTION_CAN_ACCESS_MENU,