[clang] [RISC-V] Allow intrinsics to be used with any pointer type. (PR #139634)

[Harald van Dijk via cfe-commits]

hvdijk wrote:

> This PR is too huge and it almost makes my Chrome broken. :-(

I don't think there is a way to meaningfully split this up, sorry. The changes to `llvm/include/llvm/IR/IntrinsicsRISCV.td` are the main changes, everything else is the minimal required to allow those changes.

https://github.com/llvm/llvm-project/pull/139634