Support unsigned integers in netCDF files

Kenneth Morelandrequested to merge
kmorel/vtk:netcdf-unsigned-ints into master

Previously, netCDF readers such as vtkNetCDFCFReader did not support several valid netCDF data types. In particular, the unsigned integers were not supported. The readers now check for these types and load these variables into the correct VTK array type.

Fixes: #19546 (closed)

Merge request reports