[PWGCF] FU: adding colCheck (D0 MC process), mother PDG check (eff-base), fixing a bug in PurityQA process (D0 task)

[kgwizdzi]

Changes in femtoUniverseProducerTask.cxx:

• adding the possibility to reject the MC Truth collisions which are not reconstructed in processTrackD0MC

Changes in femtoUniverseEfficiencyBase.cxx:

• adding the possibility to check the mother PDG at generated and reconstructed level, by setting confCheckMotherPDG to true, the PDG code of the mother is checked and the particle is rejected if its mother PDG is same as provided with the configurable confMotherPDGCode
• fixing all code checker errors

Changes in femtoUniversePairTaskTrackD0.cxx:

• fixing a bug in fillQA function called in processPurityQA

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 0 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/o2 for 1be094f at 2026-08-18 11:44:

No log files found

Full log here.

[alibuild]

Error while checking build/O2Physics/code-check for 7b830ac at 2026-08-18 12:37:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 2 errors and 0 warnings.'
Found 2 errors and 0 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/98d7a176268e30f58a96b2a7daeaf576a757a72a/O2Physics-code-check/errors.txt
PWGCF/FemtoUniverse/Tasks/femtoUniverseEfficiencyBase.cxx:334:7: error: do not use 'else' after 'return' [readability-else-after-return,-warnings-as-errors]
PWGCF/FemtoUniverse/Tasks/femtoUniverseEfficiencyBase.cxx:543:12: error: boolean expression can be simplified by DeMorgan's theorem [readability-simplify-boolean-expr,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 2 -gt 0 ]]
++ exit 1
--

Full log here.