Tests

Add cell volume and areas #6062

Job	Run time
Fedora	11m 57s
Debug, shared	13m 57s
Shared, OpenMP, 3D metrics	13m 57s
Optimised, static	13m 57s
Shared, release	13m 56s
PETSc unreleased, ADIOS2, 3D metrics	9m 14s
Default options, Ubuntu 22.04	13m 19s
	1h 30m 17s

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