Move call to `AiRelatedSettingsChangedEvent`

AiRelatedSettingsChangedEvent is currently emitted from NamespaceSetting::AssignAttributesServices (changed via this MR around 03/2024 from NamespaceSettings::UpdateService). But that service does not actually persist the change to the namespace settings, it just sets the attributes. So there is a chance that the group update (which calls NamespaceSetting::AssignAttributesServices) is invalid and therefore fails.

As a result, we could see events published for changes that are not persisted. I suggest that we move the publish_event action from NamespaceSettings::AssignAttributesServices into the after_update method in Groups::UpdateService so that we only emit this event when the change is successful.

Edited Apr 11, 2024 by Joanna Tomassoni