make itk.ants_registration have the same API and behavior as ants.registration

[thewtex]

Ref: https://antspyx.readthedocs.io/en/latest/registration.html

The wrapping of itk.ANTSRegistration, itk.ants_registration, should have a similar API and behavior as antspy ants.registration.

First add tests following the ANTs tests for just all the C++ interfaces, options and behavior.

Then add the corresponding Python tests.

[dzenanz]

Which ANTs files should we include and invoke from https://github.com/thewtex/ANTsWasm/blob/main/include/itkANTSRegistration.hxx? There are many abstraction layers in ANTs. ANTsPy code is not helpful there.

[dzenanz]

My WIP is coming up with:

CMake Error at CMakeLists.txt:39 (find_package):
  By not providing "FindANTS.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "ANTS", but
  CMake did not find one.

  Could not find a package configuration file provided by "ANTS" with any of
  the following names:

    ANTSConfig.cmake
    ants-config.cmake

The easiest path forward seems to be to resolve ANTsX/ANTs#1369.

[dzenanz]

With main running into:

itkANTSRegistration: warning(4): ITK type not wrapped, or currently not known: itk::DataObjectDecorator< itk::CompositeTransform< double, 2 > >
itkANTSRegistration: warning(4): ITK type not wrapped, or currently not known: itk::DataObjectDecorator< itk::CompositeTransform< double, 3 > >