[llvm] [BOLT][AArch64] Handle OpNegateRAState to enable optimizing binaries with pac-ret hardening (PR #120064)

[Gergely Bálint via llvm-commits]

bgergely0 wrote:

Hi @maksfb! Just a heads-up: we plan to merge this early next week.

Please take a look, if you have the time. Otherwise we can merge, and keep an eye on issues. 
Additional passes are only running in the smallest scope they need: on aarch64, when the input has pac-ret, so the chance of breaking other things is minimal.

https://github.com/llvm/llvm-project/pull/120064