Integrate LLVM at llvm/llvm-project@3b33b4160478
Integrate LLVM at llvm/llvm-project@3b33b4160478

Updates LLVM usage to match
[3b33b4160478](https://github.com/llvm/llvm-project/commit/3b33b4160478)

PiperOrigin-RevId: 337052227

google-research/structured-additive-IR,google-research/structured-additive-IR