Enhance compatibility with different transform types

`itk::CommandExhaustiveLog`'s Python wrapping is limited to available wrappings for `itk::Image`, which by default is only wrapped for 2- and 3-dimensional images. This limits compatible transform types in Python to just those with with three or fewer parameters. One of three methods to enhance compatibility should be pursued:
- `itk::Image` could be wrapped for higher dimensions (but this could have a build time performance impact);
- a new `itk::SpacedNdArray` type could be added to dynamically set dimensionality at runtime (useful, but significant development effort would be necessary to rival the utility of `itk::Image`);
- `itk::CommandExhaustiveLog` could be extended to accept a list of up to three variable parameters as a subset of a longer list of transform parameters, the rest of which must be fixed during the exhaustive optimization.