Tests

Add method Coordinates::communicateMetricTensor() and call after cons… #609

Job	Run time
CUDA	10m 33s
Fedora	25s
CMake, PETSc unreleased, ADIOS2	4m 54s
Default options, Ubuntu 22.04	4m 51s
Optimised, static	4m 53s
Debug, shared	4m 38s
Shared, release	4m 53s
Shared, OpenMP, 3D metrics	4m 52s
CMake, new PETSc	4m 54s
	44m 53s

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