Merge branch 'fix-autodevops-postgres-versioning' into 'master'

add postgres version to subsequent helm deploys

See merge request gitlab-org/gitlab-ce!28735

changelogs/unreleased/fix-autodevops-postgres-versioning.yml

+---
+title: Fixed ignored postgres version that occurs after the first autodevops deploy when specifying custom $POSTGRES_VERSION
+merge_request: 28735
+author: Brandon Dimcheff
+type: fixed

lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml

@@ -432,6 +432,7 @@ rollout 100%:
         --set postgresql.postgresUser="$POSTGRES_USER" \
         --set postgresql.postgresPassword="$POSTGRES_PASSWORD" \
         --set postgresql.postgresDatabase="$POSTGRES_DB" \
+        --set postgresql.imageTag="$POSTGRES_VERSION" \
         --set application.migrateCommand="$DB_MIGRATE" \
         $HELM_UPGRADE_EXTRA_ARGS \
         --namespace="$KUBE_NAMESPACE" \