workaround for disappearing assertions

We sometimes use assertions in a constexpr context.
For this, we use the comma operator like

  return GKO_ASSERT(...), value;

For some constellation of include files

  #include <ginkgo/core/base/math.hpp>
  #include <gtest/gtest.h>
  #include <hip/hip_runtime.h>
  #include "hip/test/utils.hip.hpp"

the assertions in gko::dim disappear completely for reasons
I did not want to chase down too much

  include/ginkgo/core/base/dim.hpp(109): error: expected an expression

This is a simple workaround for that issue

hip/test/base/hip_executor.hip.cpp

@@ -30,6 +30,10 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************<GINKGO LICENSE>*******************************/
 
+// prevent compilation failure related to disappearing assert(...) statements
+#include <hip/hip_runtime.h>
+
+
 #include <ginkgo/core/base/executor.hpp>
 
 
@@ -38,7 +42,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 #include <gtest/gtest.h>
-#include <hip/hip_runtime.h>
 
 
 #include <ginkgo/core/base/exception.hpp>

hip/test/base/math.hip.cpp

@@ -30,6 +30,10 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************<GINKGO LICENSE>*******************************/
 
+// prevent compilation failure related to disappearing assert(...) statements
+#include <hip/hip_runtime.h>
+
+
 #include <ginkgo/core/base/math.hpp>
 
 
@@ -39,7 +43,6 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 #include <gtest/gtest.h>
-#include <hip/hip_runtime.h>
 
 
 #include <ginkgo/core/base/array.hpp>