Add draft progress bar for 3 tasks

[boyleconnor]

Implements #442. Addresses https://github.com/huggingface/transformers/issues/22680

This is a draft PR; I am trying to figure out how to extend this progress bar to other tasks. I may also change it to accept any progress bar in the form of a callback, instead of hard-coding tqdm, or at least changing the progress bar to be optional. In the meantime, I would appreciate any advice from HF or the community.