[clang] [llvm] [clang][CodeGen] Global constructors/destructors are globals (PR #93914)

[Jessica Clarke via llvm-commits]

jrtc27 wrote:

The third argument here is like for llvm.used, it's a way to associate the entry with a global or function. If the corresponding global or function is omitted from the output then the entry will be removed. It isn't used for anything at run time. So I think there should be a consistent story between llvm.used and llvm.global_[cd]tors.

https://github.com/llvm/llvm-project/pull/93914