[FEA]: Add tests for CoroutineRunnable MRC node type

[mdemoret-nv]

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

Improvement

How would you describe the priority of this feature request

High

Please provide a clear description of problem this feature solves

For the fea-sherlock feature branch, a new class CoroutineRunnable has been added. It needs tests to ensure its functioning properly. This class is different from the existing PythonNode classes which use fibers as this node type uses coroutines.

Describe your ideal solution

Add tests that exercise edge cases when using this stage. Test scenarios should include:

1. Exception handling from C++
2. Exception handling from Python
3. Cancelling python coroutines
4. Cancelling python coroutines from C++

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

[mdemoret-nv]

Closing. This was migrated to MRC but it is complete