COMP: Move ITK_DISALLOW_COPY_AND_ASSIGN calls to public section.
COMP: Move ITK_DISALLOW_COPY_AND_ASSIGN calls to public section.

Move `ITK_DISALLOW_COPY_AND_ASSIGN` calls to public section following
the discussion in
https://discourse.itk.org/t/noncopyable

If legacy (pre-macro) copy and assing methods existed, subsitute them
for the `ITK_DISALLOW_COPY_AND_ASSIGN` macro.

InsightSoftwareConsortium/ITKTextureFeatures,InsightSoftwareConsortium/ITKTextureFeatures