fix(tracking): default step=None on tracker.log and accept extra kwargs in MLflowTracker#4039

1fanwang wants to merge 2 commits into

huggingface:mainhuggingface/accelerate:mainfrom

1fanwang:tracker-log-step-default-and-mlflow-kwargs1fanwang/accelerate:tracker-log-step-default-and-mlflow-kwargsCopy head branch name to clipboard