* add phi modeling from hf
* update for packing and use new modeling class for phi
* update e2e tests for phi to use new model name
* update example phi to also use new phi model name
* use AutoModelForCausalLM for phi lora since sample packing isn't supported
* phi sequence packing
* sample packing fixes
* fix linting
* fix inference and phi e2e tests
* update phi example now that sample packing works
* wandb import keeps getting moved around