Require KOKKOS_ENABLE_DEPRECATED_CODE_5 to be defined for including <Kokkos_ArithTraits.hpp> (#2798)

* Require KOKKOS_ENABLE_DEPRECATED_CODE_5 to be defined for including <Kokkos_ArithTraits.hpp>

Signed-off-by: Damien L-G <dalg24@gmail.com>

* Apply suggestion from review

Co-authored-by: yasahi-hpc <57478230+yasahi-hpc@users.noreply.github.com>
Signed-off-by: Damien L-G <dalg24+github@gmail.com>

---------

Signed-off-by: Damien L-G <dalg24@gmail.com>
Signed-off-by: Damien L-G <dalg24+github@gmail.com>
Co-authored-by: yasahi-hpc <57478230+yasahi-hpc@users.noreply.github.com>

Author: dalg24

common/src/Kokkos_ArithTraits.hpp

@@ -9,6 +9,10 @@
 
 #include <KokkosKernels_ArithTraits.hpp>
 
+#ifndef KOKKOS_ENABLE_DEPRECATED_CODE_5
+static_assert(false, "Header `Kokkos_ArithTraits.hpp` is deprecated, include `KokkosKernels_ArithTraits.hpp` instead");
+#endif
+
 namespace Kokkos {
 template <typename T>
 using ArithTraits [[deprecated("Use KokkosKernels::ArithTraits from KokkosKernels_ArithTraits.hpp header instead")]] =