[PWGDQ] removed condition on PDG particle code for paired MFT-MCH tracks

The commit also updated the ML training data producer task to reflect the
paired tracks definition used in the QA task, removing the condition that
the MFT and MCH tracks should be associated to the same collision (since
the matching is collision agnostic).

Author: aferrero2707

PWGDQ/Tasks/mftMchMatcher.cxx

@@ -481,23 +481,11 @@ struct mftMchMatcher {
       }
       // get the index associated to the MC particle
       auto muonMcParticle = muonTrack.mcParticle();
-      if (std::abs(muonMcParticle.pdgCode()) != muonPdgCode) {
-        continue;
-      }
 
       int64_t muonMcTrackIndex = muonMcParticle.globalIndex();
 
       // inner loop on MFT tracks
       for (const auto& mftTrack : mftTracks) {
-        // only consider MFT tracks associated to the same collision as the muon track
-        if (!mftTrack.has_collision()) {
-          continue;
-        }
-        auto mftCollisionId = mftTrack.collisionId();
-        if (mftCollisionId != muonCollisionId) {
-          continue;
-        }
-
         // skip tracks that do not have an associated MC particle
         if (!mftTrack.has_mcParticle()) {
           continue;

PWGDQ/Tasks/qaMatching.cxx

@@ -1673,8 +1673,6 @@ struct QaMatching {
         continue;
       // get the index associated to the MC particle
       auto muonMcParticle = muonTrack.mcParticle();
-      if (std::abs(muonMcParticle.pdgCode()) != kMuonMinus)
-        continue;
 
       int64_t muonMcTrackIndex = muonMcParticle.globalIndex();