Remove hardcoded HF endpoint

[Wauplin]

Currently, HF endpoint (e.g. https://huggingface.co) is hard-coded in sentence-transformers. This is problematic as it is not possible to configure it to save models from a different endpoint. In huggingface_hub it is possible to set a default endpoint using the HF_ENDPOINT environment variable. This is especially useful in testing pipelines and for users using a private Hub.

This PR removes the hard-coded endpoint and makes it configurable by huggingface_hub directly.
Also the full_model_name is not required anymore since #1743 as the repo_id is correctly inferred from model name and organization.

[Wauplin]

For context, we started to add tests from downstream libraries (like sentence_transformers) directly in huggingface_hub main repo -see PR huggingface/huggingface_hub#1200. The goal is to proactively detect breaking changes / deprecation warnings and report issues here if any.

[tomaarsen]

Resolved via #2376, the typo fix was taken into #2387. Thanks a bunch for reporting this & opening this PR!

Also made a new related PR here: huggingface/huggingface_hub#1918

• Tom Aarsen