Auto devops should wait for Deployment to complete

Vendors in Auto-DevOps.gitlab-ci.yml from
https://gitlab.com/gitlab-org/gitlab-ci-yml/merge_requests/195

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/50186

changelogs/unreleased/vendor-auto-devops-gitlab-ci-fix-503-on-deploy.yml

+---
+title: Vendor Auto-DevOps.gitlab-ci.yml to fix bug where the deploy job does not wait
+  for Deployment to complete
+merge_request: 21713
+author:
+type: fixed

vendor/gitlab-ci-yml/Auto-DevOps.gitlab-ci.yml

@@ -604,6 +604,8 @@ rollout 100%:
       --version="$CI_PIPELINE_ID-$CI_JOB_ID" \
       "$name" \
       chart/
+
+    kubectl rollout status -n "$KUBE_NAMESPACE" -w "deployment/$name"
   }
 
   function scale() {