Integrate LLVM at llvm/llvm-project@b33fbbaa34f0
Integrate LLVM at llvm/llvm-project@b33fbbaa34f0

Updates LLVM usage to match
[b33fbbaa34f0](https://github.com/llvm/llvm-project/commit/b33fbbaa34f0)

PiperOrigin-RevId: 344510775

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