WIP: Changes for several JETMX derivations
This MR changes the following:
- The new b-tagging training for VR track jets is added to JETM4 and JETM6
- Removes TCC jets from JETM4
- Changes the TRUTH3 content in JETM6 and JETM8 to be able to go through full decay history in the containers
- The variable "SizeParameter" is added for groomed and ungroomed jet collections (needed to recalculate N-subjettiness variables offline)
FYI @jveatch