4D groupwise registration not supported in currrent ITKElastix

[ViktorvdValk]

ITKElastix should be rebuild with support for 4D images to use the 4D groupwise image registration of Elastix

[thewtex]

As a first step, we want to update the wrapping configuration:

https://github.com/InsightSoftwareConsortium/ITKElastix/blob/6a4dd1d3ccf58303d5747508bf2be3785f014be6/wrapping/itkElastixRegistrationMethod.wrap

From using itk_wrap_image_filter to itk_wrap_template. Example:

https://github.com/InsightSoftwareConsortium/ITK/blob/master/Modules/Filtering/ImageStatistics/wrapping/itkLabelStatisticsImageFilter.wrap

But we want to change

foreach(d ${ITK_WRAP_IMAGE_DIMS})

to

UNIQUE(dims "${ITK_WRAP_IMAGE_DIMS};4")
foreach(d ${dims})

along with the wrapped pixel types.

[thewtex]

Addressed with update to ITK 5.2 RC 2.