Batch requests in `MLFlowLogger`

[schmidt-jake]

Proposed refactor

Update the mlflow API callsites in MLFlowLogger to use the more efficient MlflowcClient.log_batch API.

Motivation

Improve logging performance and reduce the number of API calls.

Pitch

MLFlowLogger currently executes individual API calls for every hyperparameter (in log_hyperparameters) and metric (in log_metrics) using for loops. By refactoring these two methods to use log_batch, we could reduce the number and overhead of MLFlowLogger API calls.

I'd be happy to open a PR for this.

cc @Borda

[Borda]

@schmidt-jake are you interested in implementing this feature? 🐰

[schmidt-jake]

@Borda yep, happy to do it!