[ONNX] Fix param names (#50764)

Preserve name of parameters for ONNX.

Looks like output->copyMetadata(input) API is giving the same debugName to the output. So the name of the original input is changed. This update avoid the name change by just copying the type.

torch/csrc/jit/passes/onnx/remove_inplace_ops_for_onnx.cpp

@@ -571,29 +571,27 @@ static void PrepareForRemoveMutations(MutationRemover& mr, Block* b) {
             << "Warning: ONNX Preprocess - Removing mutation on block inputs. "
             << "This changes graph semantics." << std::endl;
 
+        Node* newNode = nullptr;
         if (input->type()->kind() == TypeKind::ListType) {
           // Create an aten::list to clone the list in graph inputs
-          auto newNode = node->owningGraph()->create(aten::list, 1);
-          newNode->output()->copyMetadata(input);
+          newNode = node->owningGraph()->create(aten::list, 1);
+          newNode->output()->setType(input->type());
           newNode->addInput(input);
-          newNode->insertBefore(node);
-          node->replaceInput(index, newNode->output());
-          input->replaceAllUsesAfterNodeWith(node, newNode->output());
+          b->prependNode(newNode);
         } else {
           // Create an aten::clone to clone the tensor in graph inputs
-          auto newNode = node->owningGraph()->create(aten::clone, 1);
-          newNode->output()->copyMetadata(input);
+          newNode = node->owningGraph()->create(aten::clone, 1);
+          newNode->output()->setType(input->type());
           newNode->addInput(input);
 
           auto* noneNode = node->owningGraph()->create(prim::Constant);
           noneNode->output()->setType(NoneType::get());
           newNode->addInput(noneNode->output());
-
-          newNode->insertBefore(node);
+          b->prependNode(newNode);
           noneNode->insertBefore(newNode);
-          node->replaceInput(index, newNode->output());
-          input->replaceAllUsesAfterNodeWith(node, newNode->output());
         }
+        node->replaceInput(index, newNode->output());
+        input->replaceAllUsesAfterNodeWith(node, newNode->output());
       }
     }
   }