MDL-76869 gradebook: Pass exception to rollback

grade/classes/external/create_gradecategories.php

@@ -231,7 +231,7 @@ public static function create_gradecategories_from_data(int $courseid, array $ca
             } catch (\Exception $e) {
                 // If the submitted data was broken for any reason.
                 $warnings['database'] = $e->getMessage();
-                $transaction->rollback();
+                $transaction->rollback($e);
                 return ['warnings' => $warnings];
             }
         }