Last import of tauRecTools trigger functionalities from 21.3 into master

Hello,

This is the last MR which migrates the trigger functionalities of tauRecTools from 21.3 to master (ATR-19015). It mostly adds MVA energy scale calibration for HLT taus and allows for 0-prong taus in the working point decorator. It will likely be considered as violating the frozen T0 policy because two decorations are added to taus for online MVA TES (LeadClusterFrac and UpsilonCluster). On purpose, I did not migrate the TauTrackClassifier code, because these functionalities were never used in 2018 tau triggers, and will likely not be used in Run3 if we manage to deploy RNN track classification.

Tagging @fscutti and @adbailey .

Cheers, Bertrand