Move cloud-native-image job to the post-test stage

* The job depends on asset image created as part of the
gitlab:assets:compile job.

https://gitlab.com/charts/gitlab/issues/897

.gitlab-ci.yml

@@ -319,7 +319,7 @@ cloud-native-image:
   image: ruby:2.4-alpine
   before_script: []
   dependencies: []
-  stage: test
+  stage: post-test
   allow_failure: true
   variables:
     GIT_DEPTH: "1"
@@ -696,6 +696,7 @@ gitlab:setup-mysql:
 # Frontend-related jobs
 gitlab:assets:compile:
   <<: *dedicated-no-docs-and-no-qa-pull-cache-job
+  stage: test
   image: dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.4.4-git-2.18-chrome-69.0-node-8.x-yarn-1.2-graphicsmagick-1.3.29-docker-18.06.1
   dependencies: []
   services: