[PWGEM] PM: Add new task to try and identify late conversions with EMCal

- New task name: `o2-analysis-em-emcal-photon-mc-task`
- Fixed some minor code checker warnings and errors in Utils

Author: mhemmer-cern

PWGEM/PhotonMeson/DataModel/GammaTablesRedux.h

@@ -23,6 +23,7 @@
 #include <Framework/AnalysisDataModel.h>
 #include <Framework/Logger.h>
 
+#include <array>
 #include <cmath>
 #include <cstdint>
 #include <limits>
@@ -46,7 +47,7 @@ enum Observable {
 };
 
 // Values in tables are stored in downscaled format to save disk space
-const float downscalingFactors[nObservables]{
+const std::array<float, nObservables> downscalingFactors{
   1E0, // Cluster definition
   1E3, // Cluster energy
   1E4, // Cluster eta

PWGEM/PhotonMeson/Tasks/CMakeLists.txt

@@ -200,3 +200,8 @@ o2physics_add_dpl_workflow(photonhbt
                     SOURCES photonhbt.cxx
                     PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore O2Physics::PWGEMPhotonMesonCore
                     COMPONENT_NAME Analysis)
+
+o2physics_add_dpl_workflow(emcal-photon-mc-task
+                    SOURCES emcalPhotonMcTask.cxx
+                    PUBLIC_LINK_LIBRARIES O2::Framework O2Physics::AnalysisCore O2Physics::PWGEMPhotonMesonCore
+                    COMPONENT_NAME Analysis)