[clang] [llvm] [PAC][Driver] Support `pauthtest` ABI for AArch64 Linux triples (PR #97237)

[Anton Korobeynikov via cfe-commits]

asl wrote:

Thanks @smithp35 

I opened https://github.com/llvm/llvm-project/issues/99950 to track this

https://github.com/llvm/llvm-project/pull/97237