Integrate LLVM at llvm/llvm-project@7c02776567cc
Integrate LLVM at llvm/llvm-project@7c02776567cc

Updates LLVM usage to match
[7c02776567cc](https://github.com/llvm/llvm-project/commit/7c02776567cc)

PiperOrigin-RevId: 424343622

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