ATLHI-501: try to fix calo isolation for egamma and muon in HI
This MR tries to fix calo topo isolation for HI running. It should use the subtracted clusters if available. For muons, it should use the same as for egamma. Also, pflow isolation for muons (run in pp condition) is switched off.
The computation of the ambient energy densities for calo topo iso is switched off since no pileup correction is done. However it is still on for pflow isolation, since switching this off induces a crash elsewhere (in JRA_buildAntiKt2HIJets.trkmoms that fails to retrieve JetTrackVtxAssoc)