Add track-protocluster link

[ruse-traveler]

Briefly, what does this PR introduce?

This PR introduces the edm4eic::TrackProtoClusterLink, a parallel to the existing edm4eic::TrackClusterMatch. This functionality was identified as missing during discussion of EICrecon#1669: in order to ensure that merged/split clusters are reconstructed consistently with other clusters it's preferable for the TrackClusterMergeSplitter to output edm4eic::ProtoClusters, but the connections between the merged/split protoclusters and their antecedent tracks will need to be propagated to downstream particle flow algorithms. This new type will facilitate this.

What kind of change does this PR introduce?

• Bug fix (issue #__)
• New feature (issue Proposal for a Protocluster-Track Match #107 )
• Documentation update
• Other: __

Please check if this PR fulfills the following:

• Tests for the changes have been added
• Documentation has been added / updated
• Changes have been communicated to collaborators

Does this PR introduce breaking changes? What changes might users need to make to their code?

No.

Does this PR change default behavior?

No.

[veprbl]

This needs https://eicweb.phy.anl.gov/containers/eic_container/-/merge_requests/1135

Translates to include/edm4eic/TrackProtoClusterLinkCollection.h

// AUTOMATICALLY GENERATED FILE - DO NOT EDIT

#ifndef EDM4EIC_TrackProtoClusterLinkCollection_H
#define EDM4EIC_TrackProtoClusterLinkCollection_H

#include "edm4eic/TrackCollection.h"
#include "edm4eic/ProtoClusterCollection.h"

#include <podio/LinkCollection.h>

namespace edm4eic {

using TrackProtoClusterLinkCollection = podio::LinkCollection<::edm4eic::Track, ::edm4eic::ProtoCluster>;
using TrackProtoClusterLink = typename TrackProtoClusterLinkCollection::value_type;
using MutableTrackProtoClusterLink = typename TrackProtoClusterLinkCollection::mutable_type;

} // namespace edm4eic


#endif