Use hydro speeds in GRMHD HLL where magnetic field is zero #19547

Job	Run time
Clang-tidy (Debug)	1h 17m 19s
Commits	8s
Clang-tidy (Release)	1h 17m 6s
Files and formatting	6m 10s
Archs (gcc-9)	28m 3s
Archs (gcc-10)	38m 6s
Unit tests on macOS (x86, 13, 4)	1h 22m 22s
Unit tests on macOS (arm64, 14, 3)	39m 40s
Unit tests (gcc-9, Debug)	29m 15s
Archs (clang-13)	38m 26s
Archs (clang-14)	45m 31s
Unit tests (gcc-9, Release)	31m 23s
Unit tests (gcc-10, Debug)	31m 44s
Unit tests (gcc-10, Release)	33m 41s
Unit tests (gcc-11, Debug)	31m 34s
Unit tests (gcc-11, Release)	35m 37s
Unit tests (clang-13, Release, OFF, OFF, JEMALLOC)	34m 22s
Unit tests (clang-13, Debug, OFF, OFF, normal)	2h 58m 33s
Unit tests (clang-14, Debug, ON, OFF, JEMALLOC, 2)	35m 37s
Unit tests (clang-14, Release, 3.18.2, /work/charm_7_0_0/mpi-linux-x86_64-smp-clang, 3, ON, ON)	37m 10s
Documentation	11m 8s
Deploy documentation	0s
Release version	0s
	15h 22m 55s

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