Draft: Updates to b2stautau_mesonic_tau2lepton

Updates to !2743 (merged)

• Some of the input data for the Kpi mode were wrong and have been corrected
• New branches with isolation features were added
• The mass calculation for HHX was updated to directly use the hadron 4-momenta as opposed to the dihadron 4-momentum
• The names of some of the branches were changed to be clearer

Supersedes !2743 (merged) -- the old samples will be archived once the new samples are ready

TODO:

• See if can get 2-particle combinations of DOCA, IPCHI2, VTXCHI2 for Hmu, HHmu, Hmumu combinations
• Investigate memory issues
• Adapt for newest version of DaVinci (make sure that values of isolation features are sensible)
• Added nPVs, nTracks, etc but need to check output
• Check if any other features might be needed
• ADC, VELO counts
• Add 2025 data

Isolation changes:

Realised that RD isolation tool cuts on the CHI2 of the combination of the B and the iso_particle, not the change in CHI2

header	Before	After
SL isolation cones	Add cones of dihadron and dilepton on top of the B cone, creating many duplicates of the same particle	Each cone is kept separately. Still may have some overlap throughout the cones.
SL iso MVA cuts	MVA all per event level. Each candidate would have a duplicate of the same array.	Use ParticleToParticleWeightedRelTable to have candidate level relations. Grouped by MVA score: B + iso_particles are filtered by MVA score at ParticleCombiner level.
RD isolation cones	Cones also added on top of the B cone.	Each cone is kept separately.