* bump transformers and set roundup_power2_divisions for more VRAM improvements
* support for low bit optimizers from torch ao
* fix check for alternate optimizers and use nous models on hf for llama3
* add missing check for ao_adamw_fp8
* fix check when using custom optimizers w adamw
The strategy now supports configuring several fields: * The data field holding message arrays * the role and
content fields for each message * role mapping from source to target types
additionally this adds a sample llama3-8b instruct template using the chat template
