Sync function docstrings with their signatures

[DaoyuanLi2816]

What does this PR do?

Fixes function docstrings that drifted from their actual signatures (no functional changes).

1. Wrong parameter name (adapter_name → adapter_names). set_requires_grad (in AuxiliaryTrainingWrapper, BaseTuner, BaseTunerLayer, PeftModel, and the module-level helper) and BaseTunerLayer.set_adapter all take a parameter named adapter_names (plural), but their Args: sections documented adapter_name. Following the docs (set_requires_grad(adapter_name=...)) raises TypeError. Renamed the docstring entry to match the signature.

2. Spurious Args: model on delegating methods. PeftModel.get_layer_status(self) and PeftModel.get_model_status(self) take no model argument — they delegate to the module-level get_layer_status(model) / get_model_status(model) functions. Their docstrings had an Args: model (...) block (copied from those functions) describing a parameter the methods don't accept. Removed it from the two methods; the module-level functions (which do take model) keep their Args unchanged.

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• This PR fixes docstrings.

[DaoyuanLi2816]

Gentle ping on this one, @BenjaminBossan. It's the function-docstring/signature half of the same audit as #3319 and #3328 (both merged), covering peft_model.py and tuners_utils.py. It still merges cleanly — happy to rebase or adjust anything whenever you have a chance to take a look. Thanks!

[HuggingFaceDocBuilderDev]

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[BenjaminBossan]

Thanks for fixing the docstrings, LGTM.