[EMCAL-1154] Adjust CellLabels for cross talk emulation (AliceO2Group#14385)

- The CellLabel class used gsl::span as its members to store the mcLabels and amplitude fractions. However, when we want to use the cross talk emulation, we want to add new cells which happens inside the cross talk emulation function. Outside of this function the newley added CellLabels would point to dangling memory. That's why the members needed to be changed to std::vectors. Also a move constructor was added.

Author: mhemmer-cern

DataFormats/Detectors/EMCAL/include/DataFormatsEMCAL/CellLabel.h

@@ -35,7 +35,12 @@ class CellLabel
  public:
   // CellLabel() = default;
 
-  /// \brief Constructor
+  /// \brief Constructor using std::vector by moving NOT copying
+  /// \param labels list of mc labels
+  /// \param amplitudeFractions list of amplitude fractions
+  CellLabel(std::vector<int> labels, std::vector<float> amplitudeFractions);
+
+  /// \brief Constructor using gsl::span
   /// \param labels list of mc labels
   /// \param amplitudeFractions list of amplitude fractions
   CellLabel(std::vector<int> labels, std::vector<float> amplitudeFractions);

DataFormats/Detectors/EMCAL/src/CellLabel.cxx

@@ -17,6 +17,8 @@
 #include <cstdint>
 #include <vector>
 #include <gsl/span>
+#include <vector>
+#include <utility>
 
 using namespace o2::emcal;