Integrate LLVM at llvm/llvm-project@2ff187fbc9f2
Integrate LLVM at llvm/llvm-project@2ff187fbc9f2

Updates LLVM usage to match
[2ff187fbc9f2](https://github.com/llvm/llvm-project/commit/2ff187fbc9f2)

PiperOrigin-RevId: 466168397

tensorflow/runtime,tensorflow/runtime,tensorflow/runtime,tensorflow/runtime