refactor: speed up the pipeline by directly deploying the review app from the build step

backend/backend/.gitlab-ci.yml

@@ -9,7 +9,7 @@ integration:
     - name: registry.gitlab.com/openstapps/database:latest
       alias: elasticsearch
   script:
-    - pnpm --filter=@openstapps/backend install --prefer-offline
+    - pnpm --filter=@openstapps/backend install
     - pnpm test:integration:backend
   artifacts:
     when: always