[llvm] [PAC][CodeGen][ELF][AArch64] Support signed GOT (PR #105798)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

@MaskRay @tmatheson-arm @smithp35 Would be glad to see your feedback on this.

@MaskRay Earlier, there was a question regarding setting `STT_FUNC` type for even undefined function symbols, see [issuecomment-2360450900](https://github.com/llvm/llvm-project/pull/105798/#issuecomment-2360450900). There was some subsequent discussion, see [issuecomment-2371987887](https://github.com/llvm/llvm-project/pull/105798/#issuecomment-2371987887). Could you please give a feedback on this issue from linker's perspective?

https://github.com/llvm/llvm-project/pull/105798