[llvm] [PAC][CodeGen][ELF][AArch64] Support signed GOT (PR #96164)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

JFI: merging of this PR is blocked by merging of #96159, which is also already approved, but it's merge is blocked by #96478 :) Hopefully someone submits their feedback - feel free to add reviewers in #96478 if you know someone potentially interested and not added already.

https://github.com/llvm/llvm-project/pull/96164