Add Kokkos specific analysis definition

[calewis]

This will allow us to put specific things into the Kokkos project that are protected by __kokkos_analyzer__. For example:

#if defined(__kokkos_analyzer__)
#define KOKKOS_FUNCTION ... __attribute((annotate("KOKKOS_FUNCTION")))
#endif

Currently we use __clang_analyzer__ for this, but that doesn't get turned on when clangd is running preventing certain checks from happening in the editor.

[calewis]

Closing this for the same reason I closed #10, I just don't think it's worth cluttering the TODO list with things that might never happen. We will revisit when we decide this is needed.