Integrate LLVM at llvm/llvm-project@96a3dfeb9303
Integrate LLVM at llvm/llvm-project@96a3dfeb9303

Updates LLVM usage to match
[96a3dfeb9303](https://github.com/llvm/llvm-project/commit/96a3dfeb9303)

PiperOrigin-RevId: 359394503

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