[clang] [clang] Add support for `__ptrauth` being applied to integer types (PR #137580)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

> I think it would be reasonable to consider it done at this point, and if we do run into backwards compatibility problems we can discuss it again at that point, does that seem reasonable?

That seems reasonable to me.

https://github.com/llvm/llvm-project/pull/137580