TensorRT throws warning during conversion

[binliunls]

Describe the bug
TensorRT conversion throws warning:

WARNING:torch_tensorrt._compile:Input graph is a Torchscript module but the ir provided is default (dynamo). Please set ir=torchscript to suppress the warning. Compiling the module with ir=torchscript

To Reproduce
Run the command shown below with the spleen_ct_segmentation bundle in model zoo:

python -m monai.bundle trt_export --net_id network_def --filepath models/model_trt.ts --ckpt_file models/model.pt --meta_file configs/metadata.json --config_file configs/inference.json --precision fp32 --dynamic_batchsize "[1, 4, 8]" --use_onnx "False" --use_trace "False"

Expected behavior
Update the code as the warning suggested.