Wrap SpatialObjectToImageStatisticsCalculator for Python

[auneri]

Description

As of ITK 5.4, itk::SpatialObjectToImageStatisticsCalculator is not exposed via the Python interface.

Expected behavior

It would be great to access it as itk.SpatialObjectToImageStatisticsCalculator or, better yet, itk.spatial_object_to_image_statistics_calculator.

Actual behavior

One possible workaround involves first using SpatialObjectToImageFilter to convert the spatial object to a label image and using LabelStatisticsImageFilter for measurements, which can be computationally costly for large images.

Additional Information