Support torchbind as attribute in torch.fx symbolic tracing (#48732)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48732
add support for ScriptObject as attributes in symbolic trace.
Test Plan: OSS CI
Reviewed By: jamesr66a
Differential Revision: D25116185
fbshipit-source-id: c61993c84279fcb3c91f1d44fb952a8d80d0e552
