[Staging] Update dataset repos automatically on the Hub
do keep us updated on how it's going in staging! cc @SBrandeis  Sure ! For now it works smoothly. We'll also do a new release today.

I can send you some repos to explore on staging, in case you want to see how they look like after being updated.
For example [swahili_news](https://moon-staging.huggingface.co/datasets/swahili_news/tree/main)
Let's have a script that updates the dataset repositories on staging for now. This way we can make sure it works fine before going in prod.

Related to https://github.com/huggingface/datasets/issues/3341

The script runs on each commit on `master`. It checks the datasets that were changed, and it pushes the changes to the corresponding repositories on the Hub.

If there's a new dataset, then a new repository is created.

If the commit is a new release of `datasets`, it also pushes the tag to all the repositories.