api: add support for no interp (interp_order=0) #304

Job	Run time
pytest-docker-py310-icx-omp-adjoint	28m 4s
pytest-docker-py310-gcc-omp-adjoint	26m 54s
pytest-docker-py310-gcc-omp-base	37m 55s
pytest-docker-py310-icx-omp-base	33m 46s
pytest-docker-py310-gcc-omp-arm64-base	31m 33s
pytest-docker-py310-gcc-omp-arm64-adjoint	23m 30s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	38m 48s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	41m 18s
pytest-ubuntu-py310-gcc14-omp-base	44m 54s
pytest-ubuntu-py312-gcc13-omp-base	51m 26s
pytest-ubuntu-py310-gcc9-omp-base	40m 57s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	31m 37s
pytest-ubuntu-py312-gcc13-omp-adjoint	35m 46s
pytest-osx-py312-clang-omp-base	28m 39s
pytest-ubuntu-py313-gcc14-omp-base	46m 21s
pytest-ubuntu-py310-gcc9-omp-adjoint	32m 23s
pytest-ubuntu-py312-gcc12-cxxomp-base	54m 39s
pytest-ubuntu-py311-gcc10-noomp-adjoint	29m 28s
pytest-ubuntu-py310-gcc14-omp-adjoint	32m 59s
pytest-ubuntu-py311-gcc10-noomp-base	40m 9s
pytest-ubuntu-py313-gcc14-omp-adjoint	35m 53s
	12h 46m 59s

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