Attach compressed ZFP data as WholeDatSet field

Kenneth Morelandrequested to merge
kmorel/vtk-m:zfp-output-fields into master

Previously, point fields compressed by ZFP were attached as point fields on the output. However, using them as a point field would cause problems. So, instead attache them as WholeDataSet fields.

Also fixed a problem where the 1D decompressor created an output of the wrong size.

Merge request reports