Add support for a batched VIT Tracker

[Greendogo]

I don't have access to the original model files the ONNX was built with, but it would be great to treat the VIT Tracker like a multi-object tracker.

[fengyuentau]

Hello, thank you for bringing the discussion. I believe that multi-object tracking is another topic that needs a different design on the model and the algorithm. You could google it (maybe ask chat bots) and compare.

[Greendogo]

I believe you can use VIT Tracker, but you need access to the model files that the ONNX was built with so you can export with dynamic_axes enabled and configured.

Maybe we should start there, can someone post a link to the file the ONNX for VIT Tracker was built with?

I was looking at what I believe is some of the original work for this tracker, and it looks like dynamic_axes was disabled for the OpenCV release:
https://github.com/lpylpy0514/VitTracker/blob/c54555b53bc4abf03eab215085fb7ca10a6bc568/tracking/onnxexport.py#L398

[SRai22]

@lpylpy0514