AdaLora: Trigger warning when user uses 'r' inplace of 'init_r'

[bhargavyagnik]

Description:
This PR addresses Issue #1971 by adding a warning in __post_init__ of AdaLoraConfig when r is set to any non-default value. The changes aim to clarify the usage of init_r instead of r in AdaLoraConfig, resolving confusion around parameter naming.
Updated the docstring example in AdaLoraModel to reflect the same.

Testing:

• ✅ Verified that the warning is correctly triggered when 'r' is set in AdaLoraConfig
• ✅ Ensured that existing functionality is not affected by these changes
• ✅ Checked that the updated docstring example works as expected

Related Issues
✅ Closes #1971

[bhargavyagnik]

@BenjaminBossan is this what you were suggesting in the comment on #1971

[BenjaminBossan]

Thanks for working on this suggestion. The PR looks good (nice catch adjusting the docstring). Would you be so kind as to also add unit tests for this warning? So in tests/test_config.py, create a test where an AdaLoraConfig with r is being initialized and check that the correct warning was given? You should be able to use the with pytest.warns context manager.

Also, please ensure that the character limit of 120 chars per line is kept.

[bhargavyagnik]

Thank you for reviewing. I have added the test for AdaLoraConfig warning.

[BenjaminBossan]

Thanks, could you please run make style?

[bhargavyagnik]

Sorry, previously i could not run make properly and found out my ruff (0.5.5) version was different and was getting numerous errors. I did it with ruff==0.4.10 as you suggested in one of the PRs. Thanks.

[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.

[BenjaminBossan]

Thanks for fixing this so quickly!