[MeL] getSurfaceNormal interface change.

MeshGeoToolsLib/GeoMapper.cpp

MeshLib/Elements/CellRule.cpp

MeshLib/Elements/FaceRule.cpp

MeshLib/Elements/FaceRule.h

MeshLib/Elements/Utils.h

MeshLib/MeshEditing/ProjectPointOnMesh.cpp

MeshLib/MeshSurfaceExtraction.cpp

...tion/ConstraintDirichletBoundaryConditionLocalAssembler.h

...vectiveFreeComponentFlowBoundaryConditionLocalAssembler.h

...Condition/NormalTractionBoundaryConditionLocalAssembler.h

ProcessLib/LIE/Common/Utils.cpp

ProcessLib/SurfaceFlux/SurfaceFluxLocalAssembler.h