Try to Stablize Export file download spec in staging

What does this MR do?

This test is still in quarantine and the issue link has been changed because the previous issue is no longer valid.

This MR works around an intermittent issue where the click_download_export_link is not shown probably due to the export not getting started.

Related to: #217949 (closed)

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