ActsAnalysis: allow disabling ntuples
Specify flags.Acts.doAnalysisNtuples=False to disable Acts.doAnalysis ntuples. The ntuples can be very large (eg. 1.1 GB for 50 ttbar+PU200 events) and make it inconvenient to view if only the histograms are needed.
This MR doesn't change the default (ntuples are written out). Or should ntuples be disabled by default? Or maybe more fine-grained control of Clusters, SpacePoints, Seeds, EstimatedTrackParams ntuples?