[py310+] custom components binary operator not supported in file linting

[ryxli]

🐛 Bug

custom components using binop instead of Optional result in validation error.

custom schedulers work as intended as there is no validation

Module (check all that applies):

• [x ] torchx.spec
• torchx.component
• torchx.apps
• torchx.runtime
• torchx.cli
• torchx.schedulers
• torchx.pipelines
• torchx.aws
• torchx.examples
• other

torchx.specs.file_linter

To Reproduce

Steps to reproduce the behavior:

1. with python 3.10+ create and register any custom component, and use binopt instead of typing.Optional
2. example client: Any | None = None, instead of client: Optional[Any] = None

  File "lib/python3.10/site-packages/torchx/specs/file_linter.py", line 144, in _validate_arg_def
    if complex_type_def.value.id == "Optional":
AttributeError: 'BinOp' object has no attribute 'value'

Expected behavior

have an edge case for 3.10 where this does not cause component validation to fail

Environment

• torchx version (e.g. 0.1.0rc1): 0.6.0
• Python version: 3.10
• OS (e.g., Linux):
• How you installed torchx (conda, pip, source, docker):
• Docker image and tag (if using docker):
• Git commit (if installed from source):
• Execution environment (on-prem, AWS, GCP, Azure etc):
• Any other relevant information:

Additional context