Remove ambiguous page object name rubocop disable

What does this MR do?

Closes https://gitlab.com/gitlab-org/quality/team-tasks/issues/168

Remove last occurrence of QA/AmbiguousPageObjectName rubocop disable statements.

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