End-to-end test for Issues Analytics Premium feature

What does this MR do?

Closes gitlab-org/quality/testcases#82 (closed).

Evidence of the new test passing can be found in this job.

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