[FSDP] Fix bug in determining whether parameters need to be materialized (#97488)
Previously, `_need_to_materialize_module` would return false because:
* `managed_params =_get_orig_params(module, ignored_params)` returns a generator
* `is_meta_module = any(param.is_meta for param in managed_params)` exhausts the generator in its check
* `any(fake.is_fake(param) for param in managed_params)` would try to iterate over the empty generator and get an empty sequence, thus returning `False`
Pull Request resolved: https://github.com/pytorch/pytorch/pull/97488
Approved by: https://github.com/ngimel, https://github.com/awgu
