Updates to Fast Uniform Grid
Makes a number of revisions to vtkImageSimpleSource, primarily intended to improve throughput at scale. This is a continuation of #18146 (closed)
- Adds "Enable SMP" option to UI, so that multithreading can be turned on/off.
- Adds logic to minimize the number of cast operations
- Changes paraview source name to "Fast Uniform Grid"
- Changes whole extent property to non-advanced
Backport: release