E2E test for "CI/CD for GitHub"

What does this MR do?

Related to: https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/368

To complete test case: gitlab-org/quality/testcases#144 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content