cmake: add cuda deps for downstream packages (#1062)

Added find_dependency calls which mirror find_package in cmake/HYPRE_SetupCUDAToolkit.cmake.
Without this the downstream app has to add the same dependency paths as the hypre build

src/config/HYPREConfig.cmake.in

@@ -73,4 +73,11 @@ if(HYPRE_WITH_OPENMP)
   find_dependency(OpenMP)
 endif()
 
+if(HYPRE_WITH_CUDA)
+  find_dependency(CUDA REQUIRED)
+  if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.17)
+    find_dependency(CUDAToolkit REQUIRED)
+  endif()
+endif()
+
 include("${CMAKE_CURRENT_LIST_DIR}/HYPRETargets.cmake")