Add integration tests for Gaudi

[baptistecolle]

What does this PR do?

This PR adds an integration test for Gaudi, with the goal of eventually including it in the CI pipeline. The CI pipeline will be a scheduled nightly test to check that there is no regression in the Gaudi TEI image.

Unfortunately, while working on this, I discovered that TEI is not compatible with Gaudi 1. As a result, it’s currently not possible to enable CI for this test, since we’re still in the process of setting up a CI cluster for Gaudi 2.

This integration test starts a TEI image on HPU, embeds a sample text, and verifies that the resulting embedding matches the expected output.

[HuggingFaceDocBuilderDev]

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[regisss]

Same comment as for TGI: huggingface/text-generation-inference#3160 (review)

It seems some files are not formatted properly: https://github.com/huggingface/text-embeddings-inference/actions/runs/14595555222/job/40940476819?pr=598

[baptistecolle]

Thanks, I fixed the linting issue! I converted the PR as a draft until we have the Gaudi 2 and 3 runners for the CI

[baptistecolle]

I tested the new integration tests for Gaudi on the CI: https://github.com/huggingface/text-embeddings-inference/actions/runs/15825221027/job/44603574014. These tests use the new Gaudi 3 runners.
The goal of this PR is to add CI coverage for Gaudi to ensure that TEI works correctly on this hardware.

[Narsil]

Thanks a lot for this. This LGTM for now. In TEI, we have added some unit tests which might be nice too at some point, but this is already a great starting point.

[regisss]

I think we only need a runner with one device here no?