make 2 instance.

[Alireza3242]

I have 2 3090. I want to launch tensorrt on every gpu separately.
For this i have to change several things:

1- in tensorrt_llm/config.pbtxt:

instance_group {
  count: 0
  kind: KIND_GPU
}

2- in tensorrt_llm/1/model.py:
add:

kwargs["device_ids"] = [int(self.args["model_instance_device_id"])]

in get_parallel_config function.

Can you add this feature such that i dont need to change model.py?