* Extend header test to include all public headers, not just the ones in
  the same directory as the module CMakeLists.txt
* Fix/exclude headers and modules that could not trivially be
  patched to fix HeaderTest errors
  * Add `EXCLUDE_HEADER_TEST` option to vtk_module_add_module
  * Add finer-grained control to only exclude some header test checks
    not all.
* Add header test that verifies VTK_ABI_NAMESPACE_{BEGIN,END}
  exist in headers with visible symbols and have matching pairs.