Cmake sdpa custom op (#2671)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/2671

Enable `--use_sdpa_with_kv_cache` with Cmake.
ghstack-source-id: 220378207
exported-using-ghexport

Pre-existing lint failures
bypass-github-export-checks
bypass-github-pytorch-ci-checks

Reviewed By: digantdesai, mcr229

Differential Revision: D55344016

fbshipit-source-id: 7dafab86dc66da85c7a988a728bb5cce5382e3d6