Add another test for huggingface with customed endpoint

[Xuanwo]

it is also useful for enabling open source projects to use https://hub-ci.huggingface.co for testing.

We can set up another integration test for https://hub-ci.huggingface.co at https://github.com/apache/opendal/tree/main/.github/services/huggingface/huggingface.

Is this endpoint available for registration? I can help set up this test infra.

Originally posted by @Xuanwo in #6801 (comment)

[kszucs]

Yes, we should be able to use hub-ci for integration testing. @lhoestq can provide more info?

[lhoestq]

It's not very practical to use hub-ci since you can't create new users or tokens, it's mostly used internally at HF. However it's fine to use the regular https://huggingface.co and have a dedicated user for a CI

Anyways if the point is to test the custom endpoint, I think a simple test that checks that the URL to use is right should be enough

[Xuanwo]

Cool, so we don't need much work on this now, let's just close.