Retain the original path to Kokkos

Arndt, Danielrequested to merge
github/fork/aprokop/transitiv_kokkos into master

Created by: aprokop

This PR is simply to facilitate the discussion of the best approach to provide transitive path to Kokkos when using ArborX.

The current approach was taken from Cabana.

Feel free to close if you think this is useless.

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