Integrate LLVM at llvm/llvm-project@6359842bc088
Integrate LLVM at llvm/llvm-project@6359842bc088

Updates LLVM usage to match
[6359842bc088](https://github.com/llvm/llvm-project/commit/6359842bc088)

PiperOrigin-RevId: 375667591

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