Allow CellCenteredFlux to work for mixed systems #19748

Job	Run time
Files and formatting	6m 25s
Commits	7s
Clang-tidy (Debug)	10m 45s
Archs (gcc-9)	29m 10s
Archs (gcc-10)	40m 34s
Unit tests (gcc-9, Debug)	38m 41s
Archs (clang-13)	37m 20s
Unit tests on macOS (x86, 13, 4)	1h 12m 13s
Unit tests (gcc-9, Release)	41m 38s
Archs (clang-14)	45m 1s
Unit tests on macOS (arm64, 14, 3)	29m 40s
Unit tests (gcc-10, Debug)	40m 6s
Clang-tidy (Release)	10m 33s
Unit tests (gcc-10, Release)	45m 10s
Unit tests (gcc-11, Debug)	41m 12s
Unit tests (gcc-11, Release)	11m 59s
Unit tests (clang-13, Release, OFF, OFF, JEMALLOC)	37m 9s
Unit tests (clang-13, Debug, OFF, OFF, normal)	2h 56m 37s
Unit tests (clang-14, Debug, ON, OFF, JEMALLOC, 2)	44m 26s
Unit tests (clang-14, Release, 3.18.2, /work/charm_7_0_0/mpi-linux-x86_64-smp-clang, 3, ON, ON)	39m 39s
Documentation	8m 9s
Deploy documentation	0s
Release version	0s
	13h 26m 34s

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