Integrate LLVM at llvm/llvm-project@85ab413b53ae
Integrate LLVM at llvm/llvm-project@85ab413b53ae

Updates LLVM usage to match
[85ab413b53ae](https://github.com/llvm/llvm-project/commit/85ab413b53ae)

PiperOrigin-RevId: 363298500

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