Fix intel-mkl-src dependency and use static-linking in Dockerfile

[alvarobartt]

What does this PR do?

This PR fixes the intel-mkl-src dependency by adding the missing dep:intel-mkl-src within the mkl feature in text-embeddings-router, without it the intel-mkl-src dependency was unresolved hence the conditional features being static-linking and dynamic-linking had no target to install those features for, and those were silently ignored.

All that was leading to the intel-mkl-src to come without any of the linking types leading to all the issues recently reported on both Intel and AMD when running CPU inference without ONNX as e.g. "Intel oneMKL ERROR: Parameter 13 was incorrect on entry to SGEMM".

Fixes: #706, #636, #667, #680; and potentially also fixes #237. Additionally, it also "fixes" huggingface/candle#3018 i.e., a Text Embeddings Inference issue reported on candle instead.

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• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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@Narsil

[Narsil]

LGTM