Integrate LLVM at llvm/llvm-project@2c25f39fcce4
Integrate LLVM at llvm/llvm-project@2c25f39fcce4

Updates LLVM usage to match
[2c25f39fcce4](https://github.com/llvm/llvm-project/commit/2c25f39fcce4)

PiperOrigin-RevId: 383228437

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