[FEA]: Support ControlMessage types for AddClassificationStage and AddScoresStage

[mdemoret-nv]

Is this a new feature, an improvement, or a change to existing functionality?

New Feature

How would you describe the priority of this feature request

High

Please provide a clear description of problem this feature solves

Its currently not possible to use the AddClassificationStage or AddScoresStage with ControlMessage data types.

Describe your ideal solution

As we move more stages to support ControlMessage, these stages should follow suite. All functionality should remain constant, only the supported data type will change.

Completion Criteria

The following should be completed in order to consider this issue "Done":

• The AddClassificationStage is updated to accept ControlMessage in addition to MultiMessage
  • The python implementation has been updated to support ControlMessage
  • The C++ implementation has been updated to support ControlMessage
• The AddScoresStage is updated to accept ControlMessage in addition to MultiMessage
  • The python implementation has been updated to support ControlMessage
  • The C++ implementation has been updated to support ControlMessage
• Unit tests have been added to exercise the new ControlMessage path for AddClassificationStage
  • Including a test to verify the C++ and Python implementations generate identical results
  • Including a test to verify the ControlMessage and MultiMessage implementations generate identical results
• Unit tests have been added to exercise the new ControlMessage path for AddScoresStage
  • Including a test to verify the C++ and Python implementations generate identical results
  • Including a test to verify the ControlMessage and MultiMessage implementations generate identical results
• Documentation for the AddClassificationStage has been updated to include the new supported data type
• Documentation for the AddScoresStage has been updated to include the new supported data type

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct
• I have searched the open feature requests and have found no duplicates for this feature request