Optimization Blocklist will be used in a future diff (D40315730) to make the rewrite to transfer input/output backends optional Differential Revision: [D40315729](https://our.internmc.facebook.com/intern/diff/D40315729/) Pull Request resolved: https://github.com/pytorch/pytorch/pull/87431 Approved by: https://github.com/mcr229, https://github.com/digantdesai