[BUG] Unable to compile task with (NamedTuple, str) as the output

[ByronHsu]

Describe the bug

from typing import NamedTuple
from flytekit import task, workflow

class TaskOutputs(NamedTuple):
    train_data: str
    val_data: str


# namedtuple + str
@task
def t() -> (TaskOutputs, str):
    return TaskOutputs("train", "val"), "foo"

@workflow
def wf():
    t()

$ pyflyte run --remote test_workflow.py wf                  
Failed with Unknown Exception <class 'flytekit.core.type_engine.RestrictedTypeError'> Reason: Transformer for type <class 'tuple'> is restricted currently
Transformer for type <class 'tuple'> is restricted currently

Expected behavior

Able to compile

Additional context to reproduce

No response

Screenshots

No response

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

• Yes

Have you read the Code of Conduct?

• Yes