Add postfix to selectEM photon decoration
Add postfix to selectEM photon decoration to allow for both loose and tight working points to be configured simultaneously. Otherwise conflicts with
SelectionNameSvc ERROR /build/atnight/localbuilds/nightlies/AthAnalysis/main/athena/PhysicsAnalysis/Algorithms/SelectionHelpers/Root/SelectionNameSvc.cxx:55 (StatusCode CP::SelectionNameSvc::addAcceptInfo(const std::string&, const std::string&, const asg::AcceptInfo&)): object AnalysisPhotons_STEP3_%SYS% already has a selection named selectEM
Similar to what is already used for isolation
alg.selectionDecoration = 'isolated' + postfix + ',as_bits'