fix(models): Fix suno/bark-small CPU offload device mismatch causing CI failures

[harshaljanjani]

What does this PR do?

→ BarkCausalModel and BarkFineModel incorrectly inferred the device, causing device mismatches when enable_cpu_offload() is used. For more details on reproducing the bug, please visit the linked issue!

Fixes #43606.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you read the contributor guideline,
  Pull Request section?
• Was this discussed/approved via a Github issue or the forum? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes? Here are the
  documentation guidelines, and
  here are tips on formatting docstrings.
• Did you fix any necessary existing tests?

CI Failure:

Current Output:

Output After the Fix:

[github-actions]

[For maintainers] Suggested jobs to run (before merge)

run-slow: bark

[Rocketknight1]

Confirmed the failure, and pushing inputs to the model device makes sense to me. Thanks for the fix!

[harshaljanjani]

Thanks a ton @Rocketknight1!
I noticed the Operation Green CI PRs; I’ve been and will continue to raise fixes wherever it makes sense from my end, apart from any other bugs I notice / features I can add :)
https://github.com/huggingface/transformers/pulls?q=is%3Apr+author%3Aharshaljanjani

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.