Tentative to de-quarantine e2e test for promoting issue into epic

What does this MR do?

• Update vue file with a class for testability
• Improve method to allow element validation
• Reorder page views alphabetically
• Remove unnecessary step from the test (as per gitlab-org/quality/staging#29 (closed) description, this was one of the things that were making the test fail)
• Fabricate resources explicitly
• De-quarantine test by passing to the click_first_epic method the page that will render after it, which will validate for required elements before moving on

Closes gitlab-org/quality/staging#29 (closed).

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