FEATURE: Log when a group is deleted. (#11706)

We include the group "name" and "granted_trust_level" attributes.

app/controllers/admin/groups_controller.rb

@@ -80,6 +80,10 @@ class Admin::GroupsController < Admin::AdminController
     if group.automatic
       can_not_modify_automatic
     else
+      details = { name: group.name }
+      details[:grant_trust_level] = group.grant_trust_level if group.grant_trust_level
+
+      StaffActionLogger.new(current_user).log_custom('delete_group', details)
       group.destroy!
       render json: success_json
     end