accessible group iter: rename "new" to "new_owned"

to clarify that it's only returning owned backups that way.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/backup/hierarchy.rs

@@ -30,7 +30,7 @@ pub struct ListAccessibleBackupGroups<'a> {
 impl<'a> ListAccessibleBackupGroups<'a> {
     // TODO: builder pattern
 
-    pub fn new(
+    pub fn new_owned(
         store: &'a Arc<DataStore>,
         ns: BackupNamespace,
         max_depth: usize,