Quarantine broken tests in add_batch_comments_in_merge_request_spec

What does this MR do?

browser_ui/3_create/merge_request/add_batch_comments_in_merge_request_spec.rb

Create batch comments in merge request user submits a non-diff review / Create batch comments in merge request user submits a diff review are both constantly failing

These related tests are creating a lot of noise across multiple pipelines including production, Staging + other staging, Staging orchestrated, Nightly + other nightly jobs , Master + other master jobs

E2E Test Failure issue(s)

#340533 (closed)

Check-list

• General code guidelines check-list
  • Code review guidelines
  • Style guides
• Quarantine test check-list
  • Follow the Quarantining Tests guide.
  • Confirm the test has a quarantine: tag with the specified quarantine type.
  • Note if the test should be quarantined for a specific environment.
• Dequarantine test check-list
  • Follow the Dequarantining Tests guide.
  • Confirm the test consistently passes on the target GitLab environment(s).
    • (Optionally) Trigger a manual GitLab-QA pipeline against a specific GitLab environment using the RELEASE variable from the package-and-qa job of the current merge request.
• To ensure a faster turnaround, ask in the #quality Slack channel for someone to review and merge the merge request, rather than assigning it directly.