Add support for grounding-dino model type

[JeroendenBoef]

Feature request

Add native support for the grounding-dino model type in optimum-cli export onnx

Motivation

Grounding DINO was recently added to Huggingface transformers but on my hardware (1080ti) it results in a lower throughput than its original implementation. Speedup could be achieved through export to ONNX and subsequent optimization but the grounding-dino model is currently not natively supported as an ONNX export by optimum-cli. Is adding support for this model on the roadmap in the near future?

Your contribution

Is the custom ONNX config the only addition required for native support or would additional development be necessary?