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).