ITS2 - anomalous cluster task improvement

[nicolovalle]

1. New features for ITSBeamBackgroundStudy:

• global coordinates of clusters (r, z, phi) are computed using geometry libraries and saved in output
• configKeysValues added. Can be used to configure the output file skimming and content.

E.g. of workflow usage:

its_param=";ITSBeamBackgroundStudyParam.dumpEveryTF=2;ITSBeamBackgroundStudyParam.skimmedOnlyAfterTF=5;ITSBeamBackgroundStudyParam.saveClusterParameters=true"

o2-ctf-reader-workflow -b --ctf-input $1 --remote-regex "^alien:///alice/data/.+" --copy-cmd no-copy --onlyDet ITS | \
o2-its-standalone-postprocessing-workflow --disable-mc --input-from-upstream --its-beambkg-study --cluster-sources ITS --track-sources "" -b  --configKeyValues "${its_param}" --run 

2. Bug fix:
   Found double-free appearing when running o2-its-standalone-postprocessing-workflow, due to vector mExcludedChipMC defined in Efficiency.h which was was destroyed twice. The setting has been moved into Efficiency.cxx

[alibuild]

Error while checking build/O2/fullCI_slc9 for bfea7de at 2026-10-14 15:48:

No log files found

Full log here.

[nicolovalle]

CI failures seem unrelated, retriggering with dummy commit