Adapt threading-related API to ITK v5
- Keep classic multi-threading since the thread id is used in MatchPoint (call DynamicMultiThreadingOff() in filter ctor)
- #include "itkMultiThreader.h" -> #include "itkMultiThreaderBase.h"
- ITK_THREAD_RETURN_TYPE -> itk::ITK_THREAD_RETURN_TYPE