add torch.autograd._unsafe_set_version_counter API (#92924)
better description coming soon (but this is meant to fix https://github.com/pytorch/pytorch/issues/91093)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/92924
Approved by: https://github.com/ezyang, https://github.com/alanwaketan, https://github.com/albanD
