loopy unpacking and multi packing

Current implementation of persistency configures a packer and unpacker for each location. This MR changes this to:

• one packer per object type
• each unpacker for a given location also unpacks all linked locations if they are not unpacked already. This will allow to request a location to be unpacked individually.
• Packing and unpacking configurations are simplified. PersistRecoConf is removed as most of it's functionality is not needed anymore.

Part of set !3750 (merged) DaVinci!747 (merged) MooreAnalysis!92 (merged) Analysis!918 (merged) Moore!1638 (merged)

Event/EventPacker/src/component/BufferPackerBaseAlg.h

@@ -102,14 +102,6 @@ namespace DataPacking::Buffer {
       for ( unsigned int id = 0; id < nlinks; ++id ) {
         auto location = linkMgr->link( id )->path();
         if ( !location.empty() && location.front() != '/' ) { location = "/Event/" + location; }
-        auto packedLocation = m_containerMap.find( location );
-        if ( packedLocation != end( m_containerMap ) ) {
-          ++m_remapped;
-          location = packedLocation->second;
-        }
-        // TODO: make a derived map from m_encodingKey and m_containerMap, so that this can be written as:
-        // buffer.save<int32_t>( derived_map.at( linkMgr->link( id )->path() )
-        // and make sure that the map is re-derived if m_containerMap or m_encodingKey is modified
         auto iloc = map.find( location );
         if ( iloc == map.end() ) {
           error() << "could not locate referred location " << location << " originally: " << linkMgr->link( id )->path()
@@ -176,9 +168,6 @@ namespace DataPacking::Buffer {
 
     Gaudi::Property<bool> m_enableCheck{this, "EnableCheck", false};
 
-    // Mapping of reconstruction object to their location after packing
-    Gaudi::Property<std::map<std::string, std::string>> m_containerMap{this, "ContainerMap"};
-
     mutable Gaudi::Accumulators::StatCounter<>          m_nbPackedData{this, "# PackedData"};
     mutable Gaudi::Accumulators::MsgCounter<MSG::ERROR> m_unregisterError{
         this, "Problem unregistering data in PackerBaseAlg", 10};