Hydra configs

We could expand this to include configs for full-scale convergence testing, partial conv experiments, etc.

The trainer section gets mapped directly to the TrainingArguments class.

Notes:

• Specifying bf16 in the TrainingArguments class will override fp8 settings given to accelerate. This causes issues with the deepspeed backend, since HF will check to make sure the bf16 settings are the same between HF and Deepspeed settings.