Feature: Log classification_report metric to wandb

[szemyd]

1. Convert classification report string to pd.DataFrame()
   https://stackoverflow.com/questions/39662398/scikit-learn-output-metrics-classification-report-into-csv-tab-delimited-format
2. Create wandb.Table object wandb.Table(dataframe=my_df)
3. log it to wandb by wandb.log("table_name":wandb.Table(dataframe=my_df)): https://docs.wandb.ai/guides/data-vis/log-tables