Fix contour tree analysis kokkos crash

Abdelilah Essiarirequested to merge
aessiari/vtk-m:fix-contour-tree-analysis-kokkos-crash into master
  • Using read portal instead of write portals who do not work with the kokkos after the in-place sort algorithm has been called.
  • Added unit test using on the fly dataset
Edited by Abdelilah Essiari

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