Switch fairseq dependency to transformers' Hubert

[rsxdalv]

Since transformers is already an requirement, I'm thinking about getting fairseq's Hubert from there. Most projects will have transformers installed within them and makes the install faster + cleaner.

https://huggingface.co/docs/transformers/model_doc/hubert

[gitmylo]

I'm not sure how I would go about that, I initially wanted to make it with the transformers hubert model, but I couldn't find where I would cut the outputs of the model at a certain layer.