Resolve "compiler errors with AMR / SAAMG enabled"

/Users/gsell/src/OPAL/src/src/Solvers/AMR_MG/BelosBottomSolver.hpp: In member function 'void BelosBottomSolver<Level>::setOperator(const Teuchos::RCP<Tpetra::CrsMatrix<double, int, long int, Kokkos::Compat::KokkosDeviceWrapperNode<Kokkos::Serial> > >&, Level*)':
/Users/gsell/src/OPAL/src/src/Solvers/AMR_MG/BelosBottomSolver.hpp:75:55: error: no matching function for call to 'Tpetra::CrsMatrix<double, int, long int, Kokkos::Compat::KokkosDeviceWrapperNode<Kokkos::Serial> >::CrsMatrix(Tpetra::CrsMatrix<double, int, long int, Kokkos::Compat::KokkosDeviceWrapperNode<Kokkos::Serial> >&, Teuchos::DataAccess)'
   75 |     A_mp = Teuchos::rcp(new matrix_t(*A, Teuchos::Copy));

The problems with the aggressive loop optimisation we have to solve with #pragma statements

make[2]: *** [src/CMakeFiles/libOPAL.dir/build.make:5224: src/CMakeFiles/libOPAL.dir/Structure/FieldSolver.cpp.o] Error 1
In member function 'void Ifpack2::Impl::InvertDiagBlocks<BlockDiagView>::operator()(Ifpack2::Impl::InvertDiagBlocks<BlockDiagView>::Size, int&) const [with BlockDiagView = Kokkos::View<double***, Kokkos::Device<Kokkos::Serial, Kokkos::HostSpace>, Kokkos::MemoryTraits<1> >]':
cc1plus: error: iteration 2147483649 invokes undefined behavior [-Werror=aggressive-loop-optimizations]
In file included from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Tpetra_Experimental_BlockMultiVector_decl.hpp:46,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Tpetra_Experimental_BlockMultiVector.hpp:1,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Tpetra_Experimental_BlockCrsMatrix_decl.hpp:50,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Relaxation_decl.hpp:52,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Relaxation.hpp:1,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Details_OneLevelFactory_def.hpp:51,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Details_OneLevelFactory.hpp:2,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Details_Factory_def.hpp:46,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Details_Factory.hpp:2,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Factory_decl.hpp:48,
                 from /Users/gsell/OPAL-gcc-mp9-openmpi316/include/Ifpack2_Factory.hpp:1,
                 from /Users/gsell/src/OPAL/src/src/Solvers/AMR_MG/AmrSmoother.h:28,
                 from /Users/gsell/src/OPAL/src/src/Solvers/AMR_MG/AmrSmoother.cpp:21:
/Users/gsell/OPAL-gcc-mp9-openmpi316/include/Tpetra_Experimental_BlockView.hpp:1247:34: note: within this loop
 1247 |   for(IndexType j = numCols-2; j >= 0; j--) {

unmarked as a Work In Progress

changed target branch from master to OPAL-2.4

changed milestone to %OPAL 2.4.0

Resolve "compiler errors with AMR / SAAMG enabled"

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