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

@@ -47,6 +47,7 @@ namespace DataPacking::Buffer {
     Buffer operator()() const override {
 
       auto const* data = m_data.getIfExists();
+      m_nbInputFound += ( data != nullptr );
       if ( !data ) {
         if ( this->msgLevel( MSG::DEBUG ) ) this->debug() << "Input location " << m_data << " doesn't exist." << endmsg;
         return {0};
@@ -168,10 +169,10 @@ namespace DataPacking::Buffer {
 
     Gaudi::Property<bool> m_enableCheck{this, "EnableCheck", false};
 
+    mutable Gaudi::Accumulators::BinomialCounter<>      m_nbInputFound{this, "input found"};
     mutable Gaudi::Accumulators::StatCounter<>          m_nbPackedData{this, "# PackedData"};
     mutable Gaudi::Accumulators::MsgCounter<MSG::ERROR> m_unregisterError{
         this, "Problem unregistering data in PackerBaseAlg", 10};
-    mutable Gaudi::Accumulators::MsgCounter<MSG::WARNING> m_remapped{this, "Location remapped!", 0};
     mutable Gaudi::Accumulators::MsgCounter<MSG::WARNING> m_zero_key{
         this,
         "Encoding key is zero -- this implies explicit configuration of decoding will be required.. make sure you know "