* iam-716 - prevent a folder move operation when the folder's uid or any of its parents uids begin with k6-app
* fox folder move check and only list non-k6 folders to users
* adding tests for moving
* add a test for listing folders
* fix the other tests
* use method that adds folder parent
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Co-authored-by: IevaVasiljeva <ieva.vasiljeva@grafana.com>