[BUG] Workflow Failure Policy Not Working For Sub-Workflows

### Describe the bug

The following code does not appear to let all of the `maybe_fail_task` calls complete when one of them fails.
```python
@workflow()
def parent_workflow() -> str:
return randomly_fail_workflow()

@workflow(failure_policy=WorkflowFailurePolicy.FAIL_AFTER_EXECUTABLE_NODES_COMPLETE)
def randomly_fail_workflow() -> str:
maybe_fail_task(idx=0)
maybe_fail_task(idx=1)
maybe_fail_task(idx=2)
maybe_fail_task(idx=3)

return "test"

@task(
requests=ResourceFactory.gig_resources(1, 1, 1),
) # type:ignore [misc]
def maybe_fail_task(idx: int) -> str:
"""Foo."""
time.sleep(20 * float(idx))
if idx % 2 == 0:
raise ValueError("failed")
print(idx)
return str(idx)
```

### Expected behavior

I would expect that any nodes inside of a workflow that has a `WorkflowFailurePolicy.FAIL_AFTER_EXECUTABLE_NODES_COMPLETE` configured would be allowed to fail without aborting the rest of the workflow's nodes.

### Additional context to reproduce

_No response_

### Screenshots

_No response_

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

- [x] Yes

### Have you read the Code of Conduct?

- [x] Yes