StabilityReport only calculated with metrics specified in Report.show_stats

[miguelpher]

At the moment (V1.4.4), the StabilityReport needs the popmon.config.Report object that has the attribute show_stats to display only some metrics in the report, although all metrics are calculated and stored in StabilityReport.datastore. Would be great that only the metrics that need to be displayed are calculated, instead of all of them.

Another possibility to also speed up the StabilityReport would be to make it optional to create the visualization (make popmon.pipeline.report_pipelines.ReportPipe an optional step in the reference pipelines. I have noticed that is not easy to separately use the metrics pipelines directly, but then if only the StabilityReport.datastore is needed, it's necessary to go through all the pipeline steps.

Please, let me know your thoughts on this! Thanks!