TrkValTools: migration from barcodes to GenParticle::id()

This is part of the migration of Athena away from using GenParticle barcodes (removed in HepMC3) as a unique identifier for truth particles to GenParticle::id() instead.

Ntuple branch names have not been changed (just commented as a reminder to change them in the future), but all variables previously assigned barcode values are now assigned GenParticle::id()instead.

This merge request affects 1 package:

• Tracking/TrkValidation/TrkValTools

This merge request affects 5 files:

• Tracking/TrkValidation/TrkValTools/TrkValTools/TruthNtupleTool.h
• Tracking/TrkValidation/TrkValTools/src/InDetPrimaryConversionSelector.cxx
• Tracking/TrkValidation/TrkValTools/src/PerigeeParametersNtupleTool.cxx
• Tracking/TrkValidation/TrkValTools/src/PerigeeParametersNtupleTool.h
• Tracking/TrkValidation/TrkValTools/src/TruthNtupleTool.cxx

added PhysValidation Tracking main review-pending-level-1 labels

CI Result SUCCESS (hash 398d607d)

	Athena
externals
cmake
make
tests

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Approving from L1 side (Fábio).

removed review-pending-level-1 label

added review-approved label

merged

mentioned in commit ecfdaeab