[llvm] [llvm][aarch64] Add support for the MS qualifiers __ptr32, __ptr64, _sptr, __uptr (PR #112793)

[Daniel Paoliello via llvm-commits]

dpaoliello wrote:

@efriedma-quic would you mind having a look at the ISelLowering changes and generated assembly to make sure it makes sense?

https://github.com/llvm/llvm-project/pull/112793