Fix blockinner+OpenMP and blocklevels=2 with high-order stencils #111

Job	Run time
pytest-ubuntu-py311-gcc10-noomp-base	40m 32s
pytest-ubuntu-py312-gcc13-omp-adjoint	35m 21s
pytest-ubuntu-py311-gcc10-noomp-adjoint	28m 54s
pytest-ubuntu-py312-gcc13-omp-base	50m 32s
pytest-osx-py312-clang-omp-base	28m 14s
pytest-ubuntu-py310-gcc14-omp-base	43m 57s
pytest-ubuntu-py310-gcc14-omp-adjoint	31m 13s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	43m 56s
pytest-docker-py310-gcc-omp-arm64-base	31m 27s
pytest-ubuntu-py313-gcc14-omp-adjoint	34m 43s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	31m 2s
pytest-docker-py310-gcc-omp-arm64-adjoint	22m 38s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	38m 44s
pytest-ubuntu-py310-gcc9-omp-adjoint	30m 36s
pytest-ubuntu-py310-gcc9-omp-base	43m 57s
pytest-docker-py310-icx-omp-base	32m 13s
pytest-docker-py310-gcc-omp-adjoint	29m 22s
pytest-docker-py310-gcc-omp-base	37m 33s
pytest-ubuntu-py313-gcc14-omp-base	48m 17s
pytest-docker-py310-icx-omp-adjoint	27m 45s
pytest-ubuntu-py312-gcc12-cxxomp-base	54m 7s
	12h 45m 3s

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