dj22: use_for_related_fields is deprecated[2] (#41238)

We must declarer all_objects as base manager for the Attribute model,
without it we cannot load then save disabled attributes.

src/authentic2/models.py

@@ -317,6 +317,7 @@ class Attribute(models.Model):
         verbose_name = _('attribute definition')
         verbose_name_plural = _('attribute definitions')
         ordering = ('order', 'id')
+        base_manager_name = 'all_objects'
 
 
 class AttributeValue(models.Model):