[clang] [PAC][clang][Driver] Add signed GOT flag (PR #96160)

[Daniil Kovalev via cfe-commits]

kovdan01 wrote:

> Using cc1 options looks fine.

Thanks!

> Sorry, I made a mistake by approving #85235, which added a lot of driver options. It's not clear who are the initial ELF ptrauth users, but I am not sure with a very small user base, there are a lot of demands to customize the protection in such a fine-grained manner.

I personally am OK with deleting those driver flags and only leaving cc1 flags - I'll prepare a corresponding PR for that. Also tagging @ahmedbougacha 

https://github.com/llvm/llvm-project/pull/96160