[clang] [CMake][Release] Disable PGO (PR #88465)

[Aiden Grossman via cfe-commits]

https://github.com/boomanaiden154 approved this pull request.

LGTM.

I've run into the issue where profile data is generated again where it shouldn't be. I've meant to open up an issue and look into it at some point, but haven't had time to do so. I haven't previously run into this causing recompilations, but the outlined flow makes sense.

I'm assuming this is a stop-gap, and the plan is to eventually fix the issue and reenable PGO in the release cache?

https://github.com/llvm/llvm-project/pull/88465