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

[Gergely Bálint via llvm-commits]

bgergely0 wrote:

Force pushes: the underlying MCPlusBuilder code that recognizes pac* and aut* variants changed again, so I had to fix conflicts when rebasing onto main.

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