[EE] Add an automatic job to run QA smoke tests against Review Apps

EE port of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22853.

What does this MR do?

1. Renames review to review-deploy.
2. Renames stop_review to review-stop.
3. Adds a build-qa-image job to the prepare stage and save the QA Docker image as artifact (example: https://gitlab.com/gitlab-org/gitlab-ce/-/jobs/120967019).
4. Make review-deploy wait for gitlab:assets:compile to be done first since the CNG pipelines are depending on this job.
5. Adds a review-qa-smoke job (which waits for review-deploy to be done first) to the test stage to run the smoke QA suite against the Review App.
6. Adds a manual review-qa-all job (which waits for review-deploy to be done first) to the test stage to run the full QA suite against the Review App.
7. Updates the Review Apps documentation accordingly.

TODO (follow-up):

• review-qa-all is failing when trying to set the license: https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/124469410
  • That may just be caused by broken CSS:

What are the relevant issue numbers?

Closes gitlab-ce#49570.

Does this MR meet the acceptance criteria?

• [-] Changelog entry added, if necessary
• Documentation created/updated
• [-] Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• [-] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• EE specific content should be in the top level /ee folder
• [-] For a paid feature, have we considered GitLab.com plans, how it works for groups, and is there a design for promoting it to users who aren't on the correct plan?