DINOv2 register support

[audioXD]

What does this PR do?

This PR adds DINOv2 with registers as proposed in Vision Transformers Need Registers. My aim was to add registers with minimal code changes in a backward compatible way. My changes were made using the facebookresearch/dinov2 repository commits. I also had to add additional options for interpolation which caused me to comment and fix the intepolate embeddings method. (Said comments were written on the fly as I was understanding and changing the code and are biased, and can be removed). While doing that I added support for non square patch sizes which seamed like a bug since Dinov2PatchEmbeddings supported them, but the rest of the code didn't.

To do:

Fixes https://github.com/huggingface/transformers/issues/27379 Alternatives https://github.com/huggingface/transformers/pull/31832

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• [ ] Did you write any new necessary tests?

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