FTag training run 4 in derivation

This MR:

• renames BTagRun3Config.py into BTagConfig.py
• renames FtagRun3DerivationConfig.py into FtagDerivationConfig.py
• forward the CA config flags through the SlimmingHelper to be used to configure FTAG content + update accordingly the CA configs for all derivation formats available
• adds configuration to run Run 4 FTAG trainings + store associated variables in derivation

FYI @duperrin @bdong @ligang @sgoswami @khanov