kokkos_tpls.cmake: update default option to enable rocthrust

Avoid configuration issues with Trilinos of the form:
Make Error at kokkos/cmake/kokkos_tpls.cmake:29 (MESSAGE):
 Enabled TPL ROCTHRUST inside TriBITS build, but this can only be enabled in
 a standalone build

cmake/kokkos_tpls.cmake

@@ -39,8 +39,13 @@ IF(KOKKOS_ENABLE_HIP AND NOT KOKKOS_CXX_COMPILER_ID STREQUAL HIPCC AND NOT
 ELSE()
   SET(ROCM_DEFAULT OFF)
 ENDIF()
+IF(KOKKOS_ENABLE_HIP AND NOT KOKKOS_HAS_TRILINOS)
+  SET(ROCTHRUST_DEFAULT ON)
+ELSE()
+  SET(ROCTHRUST_DEFAULT OFF)
+ENDIF()
 KOKKOS_TPL_OPTION(ROCM    ${ROCM_DEFAULT})
-KOKKOS_TPL_OPTION(ROCTHRUST ${KOKKOS_ENABLE_HIP})
+KOKKOS_TPL_OPTION(ROCTHRUST ${ROCTHRUST_DEFAULT})
 
 IF(KOKKOS_ENABLE_SYCL AND NOT KOKKOS_HAS_TRILINOS)
   SET(ONEDPL_DEFAULT ON)