xAODHIEventAthenaPool: Update clear to work on AuxVectorData.

Update the clear method of IAuxTypeVectorFactory / AuxTypeRegistry to take
AuxVectorData instances rather than bare pointers.  Remove the clear static
method from AuxTypeVector.
Also alter clear to operate on a range, rather than a single element.

Refactoring to make possible dependencies between auxiliary variables,
as would be used to support packed links / jagged vectors.

Event/xAOD/xAODHIEventAthenaPool/src/xAODHIEventShapeAuxContainerCnv_v1.cxx

 /*
-  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 */
 
-// $Id: xAODHIEventShapeAuxContainerCnv_v1.cxx 694377 2015-09-11 13:50:57Z krasznaa $
-
 // System include(s):
 #include <stdexcept>
 
@@ -119,7 +117,7 @@ persToTrans( const xAOD::HIEventShapeAuxContainer_v1* oldObj,
          if (!src) {
             // This can happen with corrupt input files. In this case just
             // fill dummy values into the new object:
-            r.clear( auxid, dst, nindex );
+            r.clear( auxid, newInt, nindex, 1 );
             continue;
          }
          r.copy( auxid, dst, nindex, src, oindex );