WIP: Add EventView behaviour to AvalancheScheduler
Discussed here: https://its.cern.ch/jira/browse/GAUDI-1306
Adds EventView scheduling with no measurable overhead in non-view workflows.
WIP because there are other MRs (gaudi/Gaudi!449 (closed)) that will probably conflict. Also maybe this should go to gaudi/Gaudi directly?
Regards, Ben