compiler: Add 'groupby' mode to MapNodes visitor #7222

Job	Run time
pytest-ubuntu-py311-gcc11-noomp-base	54m 14s
pytest-ubuntu-py311-gcc11-noomp-adjoint	40m 7s
pytest-ubuntu-py312-gcc12-omp-base	1h 10m 30s
pytest-ubuntu-py312-gcc12-omp-adjoint	51m 54s
pytest-ubuntu-py39-gcc7-omp-base	55m 3s
pytest-ubuntu-py39-gcc7-omp-adjoint	41m 10s
pytest-ubuntu-py310-gcc10-noomp-base	53m 37s
pytest-ubuntu-py310-gcc10-noomp-adjoint	40m 13s
pytest-ubuntu-py312-gcc13-omp-base	1h 10m 7s
pytest-ubuntu-py312-gcc13-omp-adjoint	51m 10s
pytest-ubuntu-py39-gcc9-omp-base	56m 29s
pytest-ubuntu-py39-gcc9-omp-adjoint	41m 8s
pytest-osx-py312-clang-omp-base	36m 1s
pytest-docker-py39-gcc-omp-base	48m 42s
pytest-docker-py39-gcc-omp-adjoint	36m 21s
pytest-docker-py39-icx-omp-base	47m 51s
pytest-docker-py39-icx-omp-adjoint	43m 13s
	13h 57m 50s

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