Reduction not supported with ScatterNd in opset 16

[aboubezari]

Description

The ONNX ScatterND layer in opset 16 supports a reduction argument.
In onnx2trt, ScatterND is simply lowered to iScatterLayer, which does not take a reduction argument.
We should update this with a clear error message or add reduction support.

Environment

TensorRT Version: 8.6.1
ONNX-TensorRT Version / Branch: 8.6 GA release
GPU Type: A4000
Nvidia Driver Version: 535
CUDA Version: 12.2
CUDNN Version: 8.9.5
TensorFlow + TF2ONNX Version (if applicable): 2.15, 1.17

Steps To Reproduce

Use any onnx model with ScatterND max reduction and you can see the TensorRT model does not respect reductions.