Seeding art for ACTS default seeding

First clumpy attempt to have some seeding monitoring at ART level

Since we are not persistifying seeds, nor estimated parameters I have to use this little hack for running dcube on something. Unfortunately, we cannot compare against Athena (i.e. Trk or however you wanna call it)

This MR requires: !61584 (merged)

Example of outcome: https://cvarni.web.cern.ch/ActsArtTest/dcube_seeding/

/cc @pagessin @lgagnon