Updating CaloRinger containers and egamma CaloRinger flags

This MR (continuing the closed MR !64441 (closed) - porting the implementation to main) is to update the CaloRinger containers, putting:

'xAOD::RingSetContainer#PhotonRingSets', 'xAOD::RingSetAuxContainer#PhotonRingSetsAux.', 'xAOD::CaloRingsContainer#PhotonCaloRings', 'xAOD::CaloRingsAuxContainer#PhotonCaloRingsAux.'

as default (instead your conterpart for electrons that we have today). In this MR we have the inclusion of new set of egamma keys for CaloRinger, to be able to select the type of ringer features that we might want in the AOD output, using ConfigFlags.

pinging: @christos , @turra , @jlieberm,@damazio, @laforge and @jodafons to comment and check the implementation. Discussion in the JIRA ticket ATLASRECTS-7666 .