LigerCrossEntropyLoss is not patched for latest transformers models

[Tcc0403]

🐛 Describe the bug

To fix GA bug, latest transformers no longer imports CrossEntropyLoss. Instead, it's wrapped in self.loss_function which can be traced back to here. So that current patching method doesn't work on latest transformers model.

Note that labels and logits shifting operations are wrapped in loss_function as well, we need to take care of it when implementing new patching method.

Reproduce

No response

Versions

none

[ByronHsu]

fixed by #375