Fix: Pass local_files_only from pipeline() to model loading

[nandan2003]

Fixes #42269

Fixes a bug where passing local_files_only=True to pipeline() was ignored, causing models to download from the Hub even when offline mode was explicitly requested.

The Fix:
The local_files_only argument was being extracted from kwargs but was missing from the hub_kwargs dictionary that pipeline() uses to configure downloads. This PR adds the flag to hub_kwargs, ensuring it is correctly propagated to AutoConfig.from_pretrained and load_model.

Reproduction & Verification

I verified this locally by clearing the cache for a specific model (hf-internal-testing/tiny-random-bert) and attempting to load it via pipeline() with local_files_only=True.

• Before Fix: The model would download despite the flag.
• After Fix: The call correctly raises an OSError (because the model is not locally available), confirming that no connection to the Hub was attempted.

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? Yes, issue local_files_only=True in pipeline() does not prevent model downloads in transformers==4.57.1 #42269.
• Did you make sure to update the documentation with your changes? (Bug fix, no docs needed).
• Did you write any new necessary tests? (Verified manually via reproduction script).

Who can review?

@Rocketknight1 (Pipelines)

[nandan2003]

Branch updated to sync with main.

I verified this locally by clearing the Hugging Face cache and running a test script:

1. Before: pipeline(..., local_files_only=True) triggered a download.
2. After: It correctly raises OSError (indicating offline mode is respected).

The CI failure in tests_processors appears unrelated to these changes in pipelines/__init__.py.

[Wauplin]

Looks good to me, thanks for fixing this!

(might be good to add a test in ./tests/test_pipeline_mixin.py? -let's wait for a review from a transformers's maintainer :) -)

[Rocketknight1]

This PR makes sense to me! One question - can you check in the PEFT path, to see if we need to pass this there too? I'm not sure if the adapter-loading path will respect local_files_only either.

[nandan2003]

This PR makes sense to me! One question - can you check in the PEFT path, to see if we need to pass this there too? I'm not sure if the adapter-loading path will respect local_files_only either.

You're actually right. made some changes and PTAL.

[Rocketknight1]

There's a lot of unrelated style changes here! Can you pip install -e .[quality] to make sure you're using the right versions of the style tools, then make style or make fixup? That should reduce the size of the diff a lot.

[Rocketknight1]

Still a lot of unrelated style changes, sorry! Can you check against main and revert the unrelated changes that are just style like this? Most good IDEs have git compare/diff functions that should make it easy enough to do, but doing it manually shouldn't take too long either.