chore: Moved bulk action routes from AbstractSingleNodeTypeController.php and update custom_backoffice_entry doc

Author: roadiz-ci

src/Controller/AbstractSingleNodeTypeController.php

@@ -360,24 +360,6 @@ public function deleteAction(Request $request, int|string $id): ?Response
         throw new \LogicException('Use default node CRUD routes');
     }
 
-    #[\Override]
-    protected function getBulkPublishRouteName(): ?string
-    {
-        return 'appArticlesBulkPublishPage';
-    }
-
-    #[\Override]
-    protected function getBulkUnpublishRouteName(): ?string
-    {
-        return 'appArticlesBulkUnpublishPage';
-    }
-
-    #[\Override]
-    protected function getBulkDeleteRouteName(): ?string
-    {
-        return 'appArticlesBulkDeletePage';
-    }
-
     abstract protected function getShadowRootNodeName(): string;
 
     abstract protected function getNodeTypeName(): string;