Move from DataVector<xAOD::TrigComposite> to std::vector<struct>
Now that we are calculating HitDV objects in the HypoAlg, we don't need to use DataVectors or xAOD objects.
Locally (on lxplus since testbed is down) I see a reduction in average time from 36ms per event to 25ms per event, so about a 30% reduction in timing.
Relates to ATR-27489