Update e2e quick start document

What does this MR do?

Update end-to-end quick start document to keep it updated with the codebase.

See: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/14276 and https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/28643

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content