change vertex EDM to not store TrackAtVertex in Vertex anymore pt. 1

Core/include/Acts/Vertexing/AMVFInfo.hpp

Core/include/Acts/Vertexing/AdaptiveMultiVertexFinder.ipp

Core/include/Acts/Vertexing/AdaptiveMultiVertexFitter.hpp

Core/include/Acts/Vertexing/AdaptiveMultiVertexFitter.ipp

Core/include/Acts/Vertexing/KalmanVertexTrackUpdater.ipp

Core/include/Acts/Vertexing/TrackAtVertex.hpp

Core/include/Acts/Vertexing/TrackToVertexIPEstimator.ipp

Core/include/Acts/Vertexing/legacy/AMVF.cxx

Core/include/Acts/Vertexing/legacy/AMVF.h

...itTests/Core/Vertexing/AdaptiveMultiVertexFinderTests.cpp

...itTests/Core/Vertexing/AdaptiveMultiVertexFitterTests.cpp

Tests/UnitTests/Core/Vertexing/CMakeLists.txt

...nitTests/Core/Vertexing/KalmanVertexTrackUpdaterTests.cpp