Save huggingface checkpoint as artifact in mlflow callback (#17686)
Save huggingface checkpoint as artifact in mlflow callback (#17686)

* Fix eval to compute rouge correctly for rouge_score

* styling

* moving sentence tokenization to utils from run_eval

* saving ckpt in mlflow

* use existing format of args

* fix documentation

Co-authored-by: Swetha Mandava <c70f6da0efe0f4e85d55c1609dba7e196afbf727@nvidia.com>
huggingface/transformers,huggingface/transformers,huggingface/transformers,huggingface/transformers