Fix cancel button not working when uploading a file on the new issue page

What does this MR do?

Fixes the cancel button not working when uploading a file on the new issue page

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?

closes #39512 (closed)