[ET-VK][Op Redesign][2/n] Introduce OperatorRegistry (#120363)
TSIA
Differential Revision: [D53982439](https://our.internmc.facebook.com/intern/diff/D53982439/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/120363
Approved by: https://github.com/SS-JIA
ghstack dependencies: #120362
