fix: commentable_ids should be list of ids rather then a comma separated string

note: this can be dropped when upgrading to teak

Author: xitij2000

openedx/core/djangoapps/django_comment_common/comment_client/thread.py

@@ -82,6 +82,8 @@ def search(cls, query_params):
             else:
                 if user_id := params.get('user_id'):
                     params['user_id'] = str(user_id)
+                if params['commentable_ids']:
+                    params['commentable_ids'] = params['commentable_ids'].split(',')
                 response = forum_api.get_user_threads(**params)
         else:
             response = utils.perform_request(