Adapt integration tests and CI to HyTeG's new CMake configuration

• Includes HyTeG as a system dependency to suppress warnings triggered from within HyTeG.
• Removes waLBerla_import() as it is no longer needed.
• Enables host optimizations directly: Since hyteg!875 (merged), the correct way to enable host optimizations is to pass the compiler flag directly to CMake, by e.g. -DCMAKE_CXX_FLAGS=-march=native.

See discussion at hyteg#291 (closed).

.gitlab-ci.yml

@@ -69,8 +69,8 @@ operator-generation:
       -DCMAKE_CXX_FLAGS=$CMAKE_CXX_FLAGS
       -DWARNING_ERROR=$WARNING_ERROR
       -DWALBERLA_DOUBLE_ACCURACY=$WALBERLA_DOUBLE_ACCURACY
-      -DWALBERLA_BUILD_WITH_MPI=$WALBERLA_BUILD_WITH_MPI
-      -DWALBERLA_BUILD_WITH_OPENMP=$WALBERLA_BUILD_WITH_OPENMP
+      -DHYTEG_BUILD_WITH_MPI=$HYTEG_BUILD_WITH_MPI
+      -DHYTEG_BUILD_WITH_OPENMP=$HYTEG_BUILD_WITH_OPENMP
       -DWALBERLA_BUILD_WITH_METIS=$WALBERLA_BUILD_WITH_METIS
       -DWALBERLA_BUILD_WITH_PARMETIS=$WALBERLA_BUILD_WITH_PARMETIS
       -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE
@@ -92,8 +92,8 @@ operator-generation:
     - ctest --test-dir src -LE $CTEST_EXCLUDE_LABELS -C $CMAKE_BUILD_TYPE --output-on-failure -j NUM_CORES
   variables:
     CTEST_EXCLUDE_LABELS: "longrun"
-    WALBERLA_BUILD_WITH_MPI: "ON"
-    WALBERLA_BUILD_WITH_OPENMP: "OFF"
+    HYTEG_BUILD_WITH_MPI: "ON"
+    HYTEG_BUILD_WITH_OPENMP: "OFF"
     OMP_NUM_THREADS: "4"
     OMP_WAIT_POLICY: "PASSIVE"
     CMAKE_BUILD_TYPE: "Release"