get page path with $entity->toUrl()->toString()

Closes #3462369

cloudfront_cache_path_invalidate.module

@@ -230,7 +230,7 @@ function cloudfront_cache_path_invalidate_settings($entity_type, $bundle_type, $
           $paths[] = trim($value);
         }
       }
-      $detail_page = $config->get('detail_page')[$i] ? \Drupal::service('path_alias.manager')->getAliasByPath("/$bundle/" . $entity_id) : '';
+      $detail_page = $config->get('detail_page')[$i] ? $entity->toUrl()->toString() : '';
 
       if ($entity->hasLinkTemplate('canonical')) {
         $path = 'internal:/' . $entity->toUrl('canonical')->getInternalPath();