[Inference Providers] Add feature extraction task for Nebius (#3057)
* [Inference Providers] Add feature extration task for Nebius
* Apply style fixes
* update docs
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Co-authored-by: Nikita Barinov <diadorer@nebius.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Celina Hanouti <hanouticelina@gmail.com>