Tests

Fix mix up between the two shear factor variables #579

Job	Run time
CUDA	12m 57s
Fedora	37s
CMake, PETSc unreleased, ADIOS2	15m 29s
Default options, Ubuntu 22.04	15m 30s
Optimised, static	15m 28s
Debug, shared	15m 29s
Shared, release	15m 12s
Shared, OpenMP, 3D metrics	14m 47s
CMake, new PETSc	15m 30s
	2h 0m 59s

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