- Fix _loss_function attribute not found on base model with PEFT
- Fix mismatched attribute name (loss_function vs _loss_function)
- Set _loss_function on unwrapped base model for PEFT
- Enable previously skipped test_llama_lora_kd test
- Add test config fixes for LoRA kernel compatibility
Fixes https://github.com/axolotl-ai-cloud/axolotl/issues/3206