api: add mul interp mode #459

Job	Run time
pytest-docker-py310-gcc-omp-base	7m 46s
pytest-docker-py310-icx-omp-base	7m 45s
pytest-docker-py310-icx-omp-adjoint	7m 47s
pytest-docker-py310-gcc-omp-adjoint	7m 47s
pytest-docker-py310-gcc-omp-arm64-adjoint	7m 47s
pytest-docker-py310-gcc-omp-arm64-base	7m 7s
pytest-ubuntu-py310-gcc14-omp-adjoint	7m 48s
pytest-osx-py312-clang-omp-base	7m 50s
pytest-ubuntu-py312-gcc12-cxxomp-base	7m 47s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	7m 47s
pytest-ubuntu-py312-gcc13-omp-adjoint	7m 48s
pytest-ubuntu-py310-gcc9-omp-adjoint	7m 47s
pytest-ubuntu-py310-gcc14-omp-base	7m 46s
pytest-ubuntu-py311-gcc10-noomp-base	7m 49s
pytest-ubuntu-py313-gcc14-omp-adjoint	7m 46s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	7m 48s
pytest-ubuntu-py310-gcc9-omp-base	7m 48s
pytest-ubuntu-py312-gcc13-omp-base	7m 7s
pytest-ubuntu-py313-gcc14-omp-base	7m 1s
pytest-ubuntu-py311-gcc10-noomp-adjoint	7m 48s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	7m 47s
	2h 41m 26s

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