compiler: Fix handling of redundant derivatives #6215

Job	Run time
pytest-ubuntu-py311-gcc11-noomp-base	28m 4s
pytest-ubuntu-py311-gcc11-noomp-adjoint	27m 24s
pytest-ubuntu-py38-gcc12-omp-base	28m 45s
pytest-ubuntu-py38-gcc12-omp-adjoint	27m 54s
pytest-ubuntu-py37-gcc7-omp-base	29m 42s
pytest-ubuntu-py37-gcc7-omp-adjoint	28m 44s
pytest-ubuntu-py310-gcc10-noomp-base	27m 48s
pytest-ubuntu-py310-gcc10-noomp-adjoint	27m 6s
pytest-ubuntu-py312-gcc13-omp-base	39m 57s
pytest-ubuntu-py312-gcc13-omp-adjoint	38m 55s
pytest-ubuntu-py39-gcc9-omp-base	28m 55s
pytest-ubuntu-py39-gcc9-omp-adjoint	26m 42s
pytest-osx-py37-clang-omp-base	4m 9s
pytest-docker-py39-gcc-omp-base	30m 4s
pytest-docker-py39-gcc-omp-adjoint	25m 39s
pytest-docker-py39-icx-omp-base	24m 29s
pytest-docker-py39-icx-omp-adjoint	26m 29s
	7h 50m 46s

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