Use torchvision's transforms v2

[dxoigmn]

Torchvision's v2 transforms support for transform images and bounding boxes similar to how we implement via ExTransform:

MART/mart/transforms/extended.py

Line 35 in 20d2078

class ExTransform:

I think we should just standardize on Torchvision's implementation.

https://pytorch.org/vision/main/auto_examples/plot_transforms_v2.html

[dxoigmn]

See also: https://pytorch.org/vision/stable/auto_examples/plot_transforms_v2_e2e.html#sphx-glr-auto-examples-plot-transforms-v2-e2e-py