llama2 finetune issue on Xeon

[huiyan2021]

Follow the guide here: https://github.com/intel/ai-reference-models/tree/main/models_v2/pytorch/llama/training/cpu, faced several issues:

1. https://github.com/intel/ai-reference-models/blob/main/models_v2/pytorch/llama/training/cpu/finetune.py#L36
   

2. https://github.com/intel/ai-reference-models/blob/main/models_v2/pytorch/llama/training/cpu/finetune.py#L281
   

3. Run finetune.py on Xeon but failed - no attribute "weight" intel-extension-for-pytorch#701

[ZailiWang]

It's suspicious that it's due to a modeling file conflict among different transformers versions. IPEX dev is on the issue.

[huiyan2021]

Thanks for the fix, it works now except below warning which can be fixed following huggingface/transformers#29278