ENH: Extend NearestNeighborInterpolateImageFunc wrapping for RGB

Adding support for vector, RGB, and RGBA pixel types in wrapping
of itkNearestNeighborInterpolateImageFunction.   This will allow,
for example, the wrapped ResampleImageFilter to be called with
an RGB/RGBA pixel type image and use an nearestneighbor interpolator.
Currently only the linear interpolator had RGB/RGBA wrapping.

No C++ code changes were needed.  Tests already exist in ResampleImage5.

Modules/Core/ImageFunction/wrapping/itkNearestNeighborInterpolateImageFunction.wrap

@@ -4,6 +4,15 @@ foreach(d ${ITK_WRAP_IMAGE_DIMS})
   foreach(t ${WRAP_ITK_SCALAR})
     itk_wrap_template("${ITKM_I${t}${d}}${ITKM_D}" "${ITKT_I${t}${d}},${ITKT_D}")
   endforeach()
+  set(vector_dim ${d}) # Wrap only vector dimensions which are the same as image dimensions
+  foreach(v ${WRAP_ITK_VECTOR})
+    itk_wrap_template(
+      "${ITKM_I${v}${vector_dim}${d}}${ITKM_D}"
+      "${ITKT_I${v}${vector_dim}${d}},${ITKT_D}")
+  endforeach()
+  foreach(v ${WRAP_ITK_COLOR})
+    itk_wrap_template("${ITKM_I${v}${d}}${ITKM_D}" "${ITKT_I${v}${d}},${ITKT_D}")
+  endforeach()
 endforeach()
 
 set(PA3DSCI_types "F")