[Nested Folder] Block move operation that could introduce more than 8 level of depth,… (#59832)

* block move operation that could introduce more than 8 level of depth, forbid circular reference

* move getHeight to store, mock store in service

* fix linter

pkg/services/folder/folderimpl/store.go

@@ -27,4 +27,8 @@ type store interface {
 	// GetChildren returns the set of immediate children folders (depth=1) of the
 	// given folder.
 	GetChildren(ctx context.Context, cmd folder.GetTreeQuery) ([]*folder.Folder, error)
+
+	// GetHeight returns the height of the folder tree. When parentUID is set, the function would
+	// verify in the meanwhile that parentUID is not present in the subtree of the folder with the given UID.
+	GetHeight(ctx context.Context, foldrUID string, orgID int64, parentUID *string) (int, error)
 }