always create at least one partition #4968

Job	Run time
CI-Rocm-HIP (hipcc, Release, hip, serial)	32m 12s
CI-Cuda-Host (g++, Release, cuda, serial)	39m 25s
CI-Rocm-HIP (hipcc, Release, hip, mpi)	32m 28s
CI-Cuda-Host (g++, Release, cuda, mpi)	42m 32s
CI-Rocm-HIP (hipcc, Debug, hip, serial)	56m 12s
CI-Rocm-HIP (hipcc, Debug, hip, mpi)	54m 41s
CI-Cuda-Host (g++, Release, host, serial)	11m 41s
CI-Cuda-Host (g++, Release, host, mpi)	12m 17s
CI-Cuda-Host (g++, Debug, cuda, serial)	1h 9m 30s
CI-Cuda-Host (g++, Debug, cuda, mpi)	1h 13m 42s
CI-Cuda-Host (g++, Debug, host, serial)	10m 40s
CI-Cuda-Host (g++, Debug, host, mpi)	10m 39s
CI-Cuda-Host (clang++-15, Release, cuda, serial)	25m 48s
CI-Cuda-Host (clang++-15, Release, cuda, mpi)	26m 28s
CI-Cuda-Host (clang++-15, Release, host, serial)	9m 32s
CI-Cuda-Host (clang++-15, Release, host, mpi)	9m 40s
CI-Cuda-Host (clang++-15, Debug, host, serial)	7m 17s
CI-Cuda-Host (clang++-15, Debug, host, mpi)	7m 41s
	8h 52m 25s

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