Replace pg_upgrade with pg_dump/restore for windmill postgres major-version upgrade

Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/58741c1d-7822-425b-a995-deab87e5901c

Co-authored-by: szaimen <42591237+szaimen@users.noreply.github.com>

php/containers.json

@@ -998,6 +998,7 @@
         "nextcloud_aio_windmill_db"
       ],
       "restart": "unless-stopped",
+      "stop_grace_period": 1800,
       "read_only": true,
       "tmpfs": [
         "/tmp",