Update to PODIO Frame

[jmcarcell]

The EventStore has been deprecated (AIDASoft/podio#378) and will be removed. At least the following places in this repo have to be updated if we want the examples to keep running:

k4SimDelphes/examples/higgs_recoil_plots.C
7:#include "podio/EventStore.h"
61:  auto store = podio::EventStore();

k4SimDelphes/examples/read_edm4hep.C
20:#include "podio/EventStore.h"
105:  auto store = podio::EventStore();