TrigConfigSvc: remove legacy configuration support and deprecate service
Remove the legacy trigger menu configuration support (UseNewConfig==False
) and
deprecate all interface methods. No client should be using this service
instance anymore. In a second step we can remove the ITrigConfigSvc
inheritance and possibly completely delete this service in favor of
instantiating LVL1/HLTConfigSvc
directly where needed.
Also fix the TrigDecisionTool
setup in T0TriggerGetter
to use the official configuration methods.