Raise DisabledRepoError if repo is disabled

[Wauplin]

After discussion with @severo. Repositories can be disabled, in which case they won't we accessible to anyone anymore. This PR adds a custom DisabledRepoError exception when trying to access such a repo.

>>> from huggingface_hub import dataset_info
>>> dataset_info("laion/laion-art")
(...)
huggingface_hub.utils._errors.DisabledRepoError: 403 Client Error. (Request ID: Root=1-659fc3fa-3031673e0f92c71a2260dbe2;bc6f4dfb-b30a-4862-af0a-5cfe827610d8)
Cannot access repository for url https://huggingface.co/api/datasets/laion/laion-art.
Access to this resource is disabled.

Note: if user is not authenticated -no token sent-, a HTTP 401 is returned by the server as if the repo doesn't exist at all => translates to a RepoNotFound error.

[severo]

perfect!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.

[Wauplin]

Thanks for the quick review!