compiler: Guard cond_mapper lookup in halo hoisting (fix nested HaloSpot KeyError) #596

Job	Run time
pytest-docker-py310-icx-omp-adjoint	30m 19s
pytest-docker-py310-icx-omp-base	44m 4s
pytest-docker-py310-gcc-omp-adjoint	29m 37s
pytest-docker-py310-gcc-omp-arm64-adjoint	26m 51s
pytest-docker-py310-gcc-omp-base	41m 29s
pytest-docker-py310-gcc-omp-arm64-base	34m 42s
pytest-osx-py312-clang-omp-base	37m 33s
pytest-ubuntu-py310-gcc14-omp-adjoint	36m 48s
pytest-ubuntu-py310-gcc14-omp-base	49m 34s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	46m 23s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	36m 35s
pytest-ubuntu-py312-gcc12-cxxomp-base	1h 0m 47s
pytest-ubuntu-py313-gcc14-omp-adjoint	38m 35s
pytest-ubuntu-py310-gcc9-omp-adjoint	33m 36s
pytest-ubuntu-py313-gcc14-omp-base	50m 14s
pytest-ubuntu-py310-gcc9-omp-base	47m 36s
pytest-ubuntu-py311-gcc10-noomp-base	46m 21s
pytest-ubuntu-py311-gcc10-noomp-adjoint	18m 53s
pytest-ubuntu-py312-gcc13-omp-adjoint	38m 52s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	40m 33s
pytest-ubuntu-py312-gcc13-omp-base	50m 56s
	14h 0m 18s

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