fixup! test(installer): migrate end-to-end tests to PlayWright

Author: susnux

.github/workflows/playwright.yml

@@ -181,14 +181,14 @@ jobs:
         options: --health-cmd="mariadb-admin ping" --health-interval 5s --health-timeout 2s --health-retries 5
 
       postgres:
-        image: ghcr.io/nextcloud/continuous-integration-postgres-18:latest # zizmor: ignore[unpinned-images]
+        image: postgres:18 # zizmor: ignore[unpinned-images]
         ports:
           - '5432/tcp'
         env:
           POSTGRES_USER: root
           POSTGRES_PASSWORD: rootpassword
           POSTGRES_DB: nextcloud
-        options: --mount type=tmpfs,destination=/var/lib/postgresql/data --health-cmd pg_isready --health-interval 5s --health-timeout 2s --health-retries 5
+        options: --health-cmd pg_isready --health-interval 5s --health-timeout 2s --health-retries 5
 
       oracle:
         image: ghcr.io/gvenzl/oracle-free:23 # zizmor: ignore[unpinned-images]