fix error with hidden state transform on rebase - implement abstract class method

Signed-off-by: Govind Ramnarayan <105831528+govind-ramnarayan@users.noreply.github.com>

Author: govind-ramnarayan

tensorrt_llm/_torch/auto_deploy/transform/library/hidden_states.py

@@ -258,6 +258,11 @@ def get_global_buffer_initializers(cls, source_attn_node: Node) -> BufferInitial
     def get_constants(cls, source_attn_node: Node) -> List[Constant]:
         return []
 
+    @classmethod
+    def get_standard_metadata_args(cls) -> List[str]:
+        # unused, I think?
+        return []
+
 
 @TransformRegistry.register("insert_cached_residual_add")
 class InsertCachedResidualAdd(InsertCachedAttention):