[pytree][reland] Require pytree serialized_type_name (#120636)
Relanding https://github.com/pytorch/pytorch/pull/119718 as the diff which prevents breakages of torchrec [D53857843](https://www.internalfb.com/diff/D53857843) has landed
Pull Request resolved: https://github.com/pytorch/pytorch/pull/120636
Approved by: https://github.com/avikchaudhuri
