reintroduce strides which were lost in refactoring #591

Job	Run time
Build GHEX and run unit tests (cpu-gcc-mpi-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc-9...	3m 9s
Build GHEX and run unit tests (cpu-gcc-ucx-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc-9...	3m 17s
Build GHEX and run unit tests (cpu-clang-mpi-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc...	3m 27s
Build GHEX and run unit tests (cpu-clang-ucx-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc...	3m 45s
Build GHEX and run unit tests (gpu-hip-mpi-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc-9...	5m 32s
Build GHEX and run unit tests (gpu-cuda-mpi-atlas-parmetis, ghcr.io/gridtools/gridtools-base:gcc-...	5m 43s
	24m 53s

Provide feedback