WIP: online monitoring adding tau RNN variables

{{I tried to add RNN variables as scalar or vector, With taujet,tautrack and caloclusters. I added scalar variables but failed in adding vector variables. Maybe because I did not get tautrack or taucluster information correctly. It is a little messy here. I tried two ways, one(line501) follows "compute" function in TauJetRNNUtils.h, another(line488) accoding to the links from Tau Trigger meeting: {https://gitlab.cern.ch/atlas/athena/-/blob/af47171b2b80319cdda33e5c5e2ba60da894e01d/Trigger/TrigMonitoring/TrigTauMonitoring/src/TrigTauMonitorAlgorithm.cxx#L247} }}