refactor `EVALUATION` for the `edm4hep` update

Since the data model has changed, we need to refactor some of the evaluation code. Things to do include:

• update our usage of eic::Index, since we now use PODIO relations instead
• should we use edm4hep::MCParticle to replace dd4pod::Geant4Particle?
• how to match ReconstructedParticle to the MC generated particle? we no longer have mcID, do we need to add a relation in eicd?