[BUG][Flytekit] Incorrect NamedTuple type in Python 3.9

[samhita-alla]

Describe the bug
The test test_proto in the file tests/flytekit/unit/core/test_protobuf.py is failing with the error: TypeError: isinstance() arg 2 must be a type or tuple of types.
The issue is, type transformer is <function NamedTuple> in Python 3.9 and <class 'typing.NamedTuple'> in Python 3.8.

Expected behavior
No error should pop up.

To Reproduce
Steps to reproduce the behavior:
Use errors_pb2.ContainerError as the datatype in a task.

[samhita-alla]

Same error observed in test_arbit_class test in tests/flytekit/unit/core/test_type_hints.py file.