[lld] [PAC][lld][AArch64][ELF] Support signed TLSDESC (PR #113817)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

### Merge activity

* **Jan 22, 4:15 AM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/113817).


https://github.com/llvm/llvm-project/pull/113817