[CPU] Enable fused_attention pattern matcher (#107128)
Feature RFC: https://github.com/pytorch/rfcs/pull/56.
Enable the SDPA graph rewriting for Inductor CPU.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107128
Approved by: https://github.com/jgong5, https://github.com/jansel, https://github.com/eellison
ghstack dependencies: #104583, #104584, #103826, #104693, #104863
