better memory management in Geo2G4Svc

Miha Muskinjarequested to merge
mmuskinj/athena:master-Geo2G4-memory into master

Manual sweep of !22123 (merged) because of a conflict in ExtParameterisedVolumeBuilder.cxx due to the new header: #include "GeoPrimitives/CLHEPtoEigenConverter.h"

Edited by Miha Muskinja

Merge request reports