message: feat(aten::add): adding string concat evaluator
diff: @@ -342,6 +342,10 @@ auto aten_registrations TORCHTRT_UNUSED =
  auto a = args.at(n->input(0)).unwrapToDouble();
  auto b = args.at(n->input(1)).unwrapToDouble();
  return a + b;
  + } else if (args.at(n->input(0)).IValue()->isString()) {
  + auto a = args.at(n->input(0)).unwrapToString();
  + auto b = args.at(n->input(1)).unwrapToString();
  + return a + b;
  } else {
  TORCHTRT_THROW_ERROR(
  "Unimplemented data type for aten::add evaluator: "
  @@ -349,8 +353,11 @@ auto aten_registrations TORCHTRT_UNUSED =
  return {};
  }
  },
  - EvalOptions().validSchemas(
  - {"aten::add.int(int a, int b) -> (int)", "aten::add.float(float a, float b) -> (float)"})})
  + EvalOptions().validSchemas({
  + "aten::add.int(int a, int b) -> (int)",
  + "aten::add.float(float a, float b) -> (float)",
  + "aten::add.str(str a, str b) -> (str)"
  + })})
  .evaluator({c10::Symbol::fromQualString("aten::add_"),
  [](const torch::jit::Node* n, kwargs& args) -> c10::optional<torch::jit::IValue> {
  if (args.at(n->input(0)).IValue()->isList()) {
  