datasets.load_from_disk progress bar optional manual control

### Feature request

This is tangentially related to [https://github.com/huggingface/datasets/issues/7918](https://github.com/huggingface/datasets/issues/7918).

When loading a dataset with > 16 files a progress bar is shown (unless stdout is redirected or [https://github.com/huggingface/datasets/pull/7919](https://github.com/huggingface/datasets/pull/7919) is merged).

However, if you use multiple processes with data sharding, where each core loads the dataset, you get multiple copies of the progress bar (all fighting each other). It would be greatly appreciated if `datasets.load_from_disk` accepted an argument for whether to show a progress bar; default could be `None` which would retain current functionality (i.e. show if > 16 files in dataset), but user could also force the progress bar on or off as needed. Essentially just expose the progress bar visibility argument to the method's argument so that user can control it instead of it being hardcoded, where `None` would be default argument and retain current functionality.

### Motivation

Progress bar could be forced off in all processes than one, to avoid progress bar fighting and log spam.
Progress bar could also be manually forced on and off for other use cases.

### Your contribution

Possibly do a PR if this is accepted.