Integrate LLVM at llvm/llvm-project@56ae4f23b227
Integrate LLVM at llvm/llvm-project@56ae4f23b227

Updates LLVM usage to match
[56ae4f23b227](https://github.com/llvm/llvm-project/commit/56ae4f23b227)

PiperOrigin-RevId: 379348813

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