make dyanmo work with _LazyGraphModule.lazy_forward (#121259)
Fix https://github.com/pytorch/pytorch/issues/121198 .
We previously already trigger the real recompilation for LazyGraphModule when it runs thru dynamo context. But people may pass in LazyGraphModule._lazy_forward rather than the LazyGraphModule instance itself. This PR handles that.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121259
Approved by: https://github.com/williamwen42, https://github.com/jansel
