Integrate LLVM at llvm/llvm-project@b109172d993e
Integrate LLVM at llvm/llvm-project@b109172d993e

Updates LLVM usage to match
[b109172d993e](https://github.com/llvm/llvm-project/commit/b109172d993e)

PiperOrigin-RevId: 377549160

iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox,iree-org/iree-llvm-sandbox