* Revert "Revert "Add FolderUID for library elements" (#83776)"
This reverts commit 0dfdb2ae47.
* Fix bug, dashboard id and library element fodler_id are the corresponding values
Dashboard table hold both dahboards and tables
* Add FolderUID in missing places for libraryelements
* Add migration for FolderUID in library elements table
* Add Folder UIDs tolibrary panels
* Adjust dashboard import with folder uid
* Fix lint
* Rename back FolderUID to UID
* Remove default
* Check if folderUID is nil
* Add unique indes on org_id,folder_uid,name and kind
* Update pkg/services/libraryelements/database.go
Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>
* Fix folder integration test, with unique index on library elements
* Make folder uids nullable and rewrite migration query
* Use dashboard uid instead of folder_uid
* Adjust test
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Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>
* Expose library element service's folder service
* Register library panels, add count implementation
* Expand folder counts test
* Update registry deletion method interface
* Allow getting library elements from any folder
* Add test for library panel deletion
* Add test for library panel counting
