Update of HLTbphys web display han configuration
This MR updates the collision han configuration for T0 monitoring web display to
- use regexes to define chain names, avoiding repetitions;
- add di-electron monitoring histograms.
A test web display can be found here: https://atlasdqm.cern.ch/webdisplay/test/11377/physics_Main/run_310000/run/HLT/TRBPH/