Fix MUSCL THINC right-state using already-overwritten left-state values #4365

Job	Run time
Detect File Changes	10s
Lint Gate	1m 18s
Github (macos, mpi, debug, false)	1s
Github (ubuntu, mpi, debug, true)	26m 8s
Github (ubuntu, no-mpi, single, no-debug, false)	1s
Georgia Tech \| Phoenix (gpu-acc)	1s
Github (ubuntu, mpi, debug, false)	1s
Github (macos, mpi, no-debug, false)	26m 8s
Github (ubuntu, mpi, no-debug, true)	1s
Oak Ridge \| Frontier (gpu-acc)	1s
Github (ubuntu, mpi, no-debug, false)	1s
Oak Ridge \| Frontier (cpu)	1s
Oak Ridge \| Frontier (AMD) (gpu-omp)	1s
Oak Ridge \| Frontier (AMD) (cpu)	26m 9s
Georgia Tech \| Phoenix (cpu)	1s
Georgia Tech \| Phoenix (gpu-omp)	1s
Oak Ridge \| Frontier (gpu-omp)	26m 8s
	1h 46m 12s

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