Fix moving non zipped uploaded dataset to target folder

[MichaelBuessemeyer]

Fix bug for uploading datasets in case a baseFolder is configured for the datastore. The error is caused by path.subpath always returning a relative path even in case the path is absolute. This is intended behaviour by the docs 🙈

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• Test locally. Configure a in application.conf:

  datastore {
  baseFolder = `<absolute_path_to_binary_folder>`
  

• run yarn enable-jobs
• Test uploading a zip file, a single file (e.g. tiff) and multiple files e.g. multiple jpegs.
• Every try should succeed

Issues:

• follow up of Fix dataset upload for absolute baseFolder paths #8098

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(Please delete unneeded items, merge only when none are left open)

• Updated changelog
• Needs datastore update after deployment