Integrate LLVM at llvm/llvm-project@888307ee625b
Integrate LLVM at llvm/llvm-project@888307ee625b

Updates LLVM usage to match
[888307ee625b](https://github.com/llvm/llvm-project/commit/888307ee625b)

PiperOrigin-RevId: 373100219

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