MuonR4 - Introduce mapping function between symmetric matrices & vectors

• Helper functions to establish a bijective mapping between the elements of a NxN matrix A with A_{ij} = A_{ji} and a linear vector
• Keep track which tube layer is the first from the second multilayer
• Hit sorting before creating the segment.

MuonSpectrometer/MuonPhaseII/MuonPatternRecognition/MuonPatternRecognitionAlgs/src/SegmentFittingAlg.cxx

@@ -276,7 +276,6 @@ namespace MuonR4 {
         genCfg.hitPullCut = m_seedHitChi2;
         genCfg.recalibSeedCircles = m_recalibSeed;
         genCfg.fastSeedFit = m_refineSeed;
-        genCfg.fastSegFitWithT0 = m_doT0Fit;
         genCfg.calibrator = m_calibTool.get();