Remove from quarantine and add skip_live_env meta

What does this MR do?

Removes the export file download end-to-end test from quarantine and add :skip_live_env meta based on this comment.

Related to #296212 (closed)

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