lima/vecgeom-144 - Fixes to AOS3D and SOA3D affecting complex_test1
Modified the initialization of fSize (from sz to 0) on calls to constructors(int sz). Method set() had to be modified, to adjust fSize as needed, and push_back() also uses set(), after increasing fCapacity if needed.
Test test_aos3d() in complex_tes1 was also modified, taking new behavior into account.