[clang] [clang][ptrauth] add support for options parameter to __ptrauth (PR #136828)

[Oliver Hunt via cfe-commits]

ojhunt wrote:

This PR is a draft as it will need to be updated to merged correctly, and verify test output (conflicts, unintentional mismatches coming from splitting out the PR) after #136828

https://github.com/llvm/llvm-project/pull/136828