Add QE MR template for quarantined tests

What does this MR do?

The MR adds Quarantine/ Dequarantine MR template to speed up the process and ensure all the right labels are applied.

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because _____.
• [-] Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content