Integrate LLVM at llvm/llvm-project@f4d78a5e3aee
Integrate LLVM at llvm/llvm-project@f4d78a5e3aee

Updates LLVM usage to match
[f4d78a5e3aee](https://github.com/llvm/llvm-project/commit/f4d78a5e3aee)

PiperOrigin-RevId: 359543192

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