TST Add GPU training tests for p-tuning & prefix tuning #2844
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There are already GPU tests for P-tuning and prefix tuning, but none that involve actual training. This PR adds two training tests (analog to what we have with LoRA) using transformers
Trainer.This can be important because changes in Trainer, for instance how cache is handled, can impact the possibility of training with prompt learning methods.
A recent example for a change is huggingface/transformers#41585. Although it doesn't break anything, it shows the potential for breaking in the
Trainerclass that could impact these PEFT methods.