[EE] Retry the review-{deploy,qa} jobs twice, and allow them to fail

CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/23510

What does this MR do?

• a0c48fa0 Add an 'How-To' section to the Review Apps doc
• fc56b46f Ensure the default ApplicationSetting record is created first
• 3f6edc72 [QA] Better retrieve job ID for a retried job
• 747ba522 Retry the review-{deploy,qa} jobs twice

What are the relevant issue numbers?

Closes gitlab-ce#54717, gitlab-ce#54610.

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?
• [-] Security reports checked/validated by reviewer