Dropping large MC truth collections from SUSY3, 5, 11, and apply thinning to taus

Hello,

This MR is implementing the changes described in ATLSUSYDPD-2048, in order to reduce the DAOD size for the upcoming reprocessing (ATLSUSYDPD-2065, ATLSUSYDPD-2066, ATLSUSYDPD-2067).

SUSY3 changes:

• only consider RNN taus in the skimming, no more (RNN OR BDT), as BDT tau ID is deprecated
• move tau ID skimming from loose WP to very loose WP, to have a chance to use the FTTF tool for fake tau background
• apply thinning to taus, keep only taus with pt > 15 GeV and only keep tau/ID tracks that are classified as charged tau track
• drop large MC truth collections not used in analysis: TruthParticles, TruthEvents, TruthVertices
• use TruthLinkRepointTool, such that reco objects are truth-matched against TRUTH3 collections instead of TruthParticles

SUSY5 changes:

• apply thinning to taus, keep only taus with pt > 15 GeV and only keep tau/ID tracks that are classified as charged tau track
• drop TruthParticles, TruthEvents
• TruthVertices was kept because there seems to be more interest in vertices in SUSY5
• use TruthLinkRepointTool

SUSY11 changes:

• apply thinning to taus, keep only taus with pt > 15 GeV and only keep tau/ID tracks that are classified as charged tau track
• drop TruthParticles (with custom truth thinning), TruthEvents, TruthVertices
• use TruthLinkRepointTool

Minor adjustments were made to "ExtraVariables".

Size reduction for DAODs:

• SUSY3 data: -5.3%
• SUSY5 data: -8.7%
• SUSY11 data: -11.3%
• SUSY3 MC: -25%
• SUSY5 MC: -6.6%
• SUSY11 MC: -13.2% (concerns few samples, SUSY11 is mostly used for data)

I set the "urgent" flag because we'd like to have the MR in quickly, so a cache can be built, and the reprocessing launched hopefully on Friday.

Cheers, Bertrand