Use HLT menu in RoIs decoding
After these changes, L1 is using the HLT menu to configure itself. There will be followup MR in which JO properties will be removed. And another in which the new L1 menu will be used to obtain L1 threshold decoding information.
Suboptimal are replicated configurations of HLTConfigSvc in emulation tests. They will also be cleaned up soon. Tagging @tamartin and @fpastore as it is relevant for the combined chains development.