Updated Field API variants of the clouds dwarf (CPU and GPU) #541

Job	Run time
gnu/9.4.0	38s
gnu/9.4.0 --with-gpu --with-loki --with-atlas	10m 22s
gnu/9.4.0 --with-gpu --with-loki --with-atlas --with-mpi	10m 27s
gnu/9.4.0 --single-precision --with-gpu --with-loki --with-atlas --with-mpi	10m 40s
gnu/9.4.0 --with-serialbox	1m 39s
gnu/9.4.0 --with-serialbox --with-gpu --with-loki --with-atlas	11m 18s
gnu/9.4.0 --with-serialbox --with-gpu --with-loki --with-atlas --with-mpi	11m 24s
gnu/9.4.0 --with-serialbox --single-precision --with-gpu --with-loki --with-atlas --with-mpi	10m 42s
gnu/9.4.0 --cloudsc-fortran-pyiface=ON --cloudsc-python-f2py=ON	1m 43s
nvhpc/21.9 --with-gpu --with-loki --cmake="ENABLE_ACC=OFF"	15m 1s
nvhpc/21.9 --with-gpu --with-loki --with-cuda	18m 19s
nvhpc/21.9 --single-precision --with-gpu --with-loki --with-cuda --with-atlas	31m 21s
nvhpc/21.9 --with-serialbox --with-gpu --with-loki --with-cuda --with-atlas	25m 23s
nvhpc/23.5 --with-gpu --with-loki --cmake="ENABLE_ACC=OFF"	14m 53s
nvhpc/23.5 --with-gpu --with-loki --with-cuda	16m 28s
nvhpc/23.5 --single-precision --with-gpu --with-loki --with-cuda --with-atlas	29m 20s
nvhpc/23.5 --with-serialbox --with-gpu --with-loki --with-cuda --with-atlas	26m 57s
	4h 6m 35s

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