Avoid overflow for volume fraction calculation#1895
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…ractions on larger meshes.
…o bugfix/whitlock/batched_volfrac_creation_mfem
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This PR resolves #1871 by:
shaping::computeVolumeFractionsForMaterialso it works on groups of elements rather than all elements at once when it looks like the number of values will overflow int32shaping::computeVolumeFractionsForMaterialso we can parallelize for OpenMP some of the more expensive algorithm phasesShaping driver varying mesh size for spheres.yaml input with order 4 output
