[Model] Add JambaForSequenceClassification model

[yecohn]

[Model] Add support for embedding model JambaClassfication](#10858)

[github-actions]

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[DarkLight1337]

Thanks for adding this, do you have a HF repo that we can refer to? Don't forget to update the Supported Models page.

[noamgai21]

We have a test model that can be used to test the functionality of the code:
https://huggingface.co/ai21labs/Jamba-tiny-reward-dev

[DarkLight1337]

We have a test model that can be used to test the functionality of the code: https://huggingface.co/ai21labs/Jamba-tiny-reward-dev

Thanks for this! I'll update the PR accordingly so that the model tests can pass.

[mergify]

This pull request has merge conflicts that must be resolved before it can be
merged. Please rebase the PR, @yecohn.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

[tomeras91]

@DarkLight1337 - DCO is the only failing check. Can this get a force merge?

[DarkLight1337]

I just realized that this model is supposed to be a reward model, not a classification model... should we rename the model?