clang-tidy: fix `readability-avoid-return-with-void-value` lints

Charts/Core/vtkPlot.h

Common/Core/vtkMersenneTwister.h

Common/Core/vtkSMPTools.cxx

Common/Core/vtkSortDataArray.cxx

Common/DataModel/vtkAMRInformation.cxx

Common/DataModel/vtkAnnulus.cxx

Common/DataModel/vtkCellArray.h

Common/DataModel/vtkCellGridRangeQuery.h

Common/DataModel/vtkCellTreeLocator.cxx

Common/DataModel/vtkHyperTreeGridNonOrientedSuperCursor.cxx

...Model/vtkHyperTreeGridNonOrientedUnlimitedSuperCursor.cxx

Common/DataModel/vtkOverlappingAMR.cxx

Common/DataModel/vtkOverlappingAMR.h

Common/DataModel/vtkPolygon.cxx

Common/DataModel/vtkSphere.h

Common/DataModel/vtkSphericalPointIterator.cxx

Common/DataModel/vtkStaticCellLinks.h

Common/DataModel/vtkStaticCellLocator.cxx

Common/DataModel/vtkStaticPointLocator.cxx

Common/DataModel/vtkStaticPointLocator2D.cxx