Fix media check macros for MVD compat + re-enable check_media CI-CDASH test

- In create_medialist.C, output path relative to vacuum node when MVD detected + exit if file w/o Fair GeoManager
- In check_media.C, detect eventual MVD node amond subnodes of pipe vacuum and also check it with a custom function (relative path)
- Re-add the check-media test and make all digitization and reconstruction tests dependent on it (invalid anyway if geo is corrupt)