Fix backup test

[Hyper-Node]

MaRDI Pull Request

Changes:

• removing empty folder deletion to prevent 403 error when accessing the folder
• wip for testing with CI

Instructions for PR review:

• [ ] Conceptual Review (Logic etc...)
• [ ] Code Review (Review your implementation)
• [ ] Checkout (Test changes locally)

Checklist for this PR:

• [ ] Reviewers and Assignee specified.
• [ ] All related issues are linked.

[physikerwelt]

@Hyper-Node please reopen if active.