[BUG] pyflyte run fails when ContainerTask is executed locally

[zeryx]

Describe the bug

When using pyflyte run on a workflow that contains a ContainerTask, the ContainerTask and WF fails during tracing when attempting to run locally. When either passing --remote or registering a workflow with pyflyte register to a flyte cluster, no error is reported.

                                   TypeError: Error encountered while executing 'proxy_registration_wf':                            
                                      Failed to convert outputs of task 'register' at position output:                               
                                      Python value cannot be None, expected <class 'str'>/<FlyteLiteral simple:                      
                                    STRING>                                                                                          
Failed with Unknown Exception <class 'TypeError'> Reason: Error encountered while executing 'proxy_registration_wf':
  Failed to convert outputs of task 'register' at position output:
  Python value cannot be None, expected <class 'str'>/<FlyteLiteral simple: STRING>
Error encountered while executing 'proxy_registration_wf':
  Failed to convert outputs of task 'register' at position output:
  Python value cannot be None, expected <class 'str'>/<FlyteLiteral simple: STRING>

Expected behavior

either throw an error stating that ContainerTasks are not supported with local pyflyte run execution, or provide support for executing ContainerTasks locally.

Additional context to reproduce

https://gist.github.com/zeryx/b3d4cca7594de252a08ae8a02c2d5d6b

create a WF (or dynamic task) that triggers a ContainerTask
define the ContainerTask to have inputs and outputs
execute an arbitrary step within the ContainerTask (not reading or writing from pipes)
trigger the workflow with pyflyte run without --remote

Screenshots

No response

Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes