MDL-64702 badges: Add missing data to backup

Backup and restore of badges is missing data:
* related badges
* alignments
* endorsement

Also added to "clone" (duplicate a badge).

badges/classes/external.php

@@ -150,7 +150,7 @@ class core_badges_external extends external_api {
             // Create a badge instance to be able to get the endorsement and other info.
             $badgeinstance = new badge($badge->id);
             $endorsement = $badgeinstance->get_endorsement();
-            $competencies = $badgeinstance->get_alignment();
+            $competencies = $badgeinstance->get_alignments();
             $relatedbadges = $badgeinstance->get_related_badges();
 
             if (!$canconfiguredetails) {