Support new Quantile Regression Model

[brifordwylie]

• sageworks/core/artifacts/model_core.py", line 616

Endpoint Core

        # Compute the standard performance metrics for this model
        model_type = self.model_type()
        if model_type == ModelType.REGRESSOR.value:
            prediction_df = self.residuals(target_column, prediction_df)
            metrics = self.regression_metrics(target_column, prediction_df)
        elif model_type == ModelType.CLASSIFIER.value:
            metrics = self.classification_metrics(target_column, prediction_df)
        else:
            # Unknown Model Type: Give log message and set metrics to empty dataframe
            self.log.warning(f"Unknown Model Type: {model_type}")
            metrics = pd.DataFrame()