BUG: Let DataObjectError override `ExceptionObject::Print`

[N-Dekker]

Instead of introducing a new virtual member function, DataObjectError::PrintSelf.

It is essential that DataObjectError overrides ExceptionObject::Print, because that is the member function that is called, when doing std::cerr << error for a DataObjectError.

• Fixes issue #5666

[N-Dekker]

Thinking of how this went on for so long, I realized I never used DataObjectError. I guess most code uses itk::ExceptionObject.

DataObjectError is the base class of InvalidRequestedRegionError, which is thrown quite a few times (in more than 10 different places), in ITK/Modules. 🤷

[dpshamonin]

Thank you, Niels