[llvm] [clang] [CodeGen][arm64e] Add methods and data members to Address, which are needed to authenticate signed pointers (PR #67454)

[Anton Korobeynikov via cfe-commits]

https://github.com/asl requested changes to this pull request.

See the comment about function argument evaluation order that causes instability of the codegen with pauth.

https://github.com/llvm/llvm-project/pull/67454