[clang] [clang][CodeGen] Make `UnqualPtrTy` truly unqualified (PR #94388)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

llvm::PointerType::getUnqual assumes pointers to addr-space 0 are "unqualified"... but the discussion on #88182 concluded that doesn't make sense: the "unqualified" address space is a target-specific choice, and address-space zero isn't required to have any meaning at all.

Given that, it seems like this is going in the opposite direction of what you want.

https://github.com/llvm/llvm-project/pull/94388