[Dynamo] Support skip fbcode modules (#98192)
Fix Meta internal use case:
* We are going to skip tracing ```torchrec.distributed```, however, in fbcode, the structure is a bit different from OSS torchrec.
* Meta internally uses ```torch.package```, so we should support skip tracing files like ```<torch_package_0>.torchrec/distributed/...```.
* We put the logic behind a flag ```is_fbcode``` to avoid misuse.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/98192
Approved by: https://github.com/yf225
