Add checks about Kokkos options

[tpadioleau]

This PR comes from errors in the Spack package. Kokkos provides cmake functions to help checking that options are enabled. As we require some kind of "exotic" Kokkos options, I think we should check they are actually enabled.

We were appending twice to CMAKE_MODULE_PATH, I removed one of them.

Note I also did that in https://github.com/CExA-project/ddc.

Merge Request - GuideLine Checklist

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• No large data files have been added to the repository. Maximum size for files should be of the order of KB not MB. In particular avoid adding of pdf, word, or other files that cannot be change-tracked correctly by git.