Integrate LLVM at llvm/llvm-project@4c973ae51b85
Integrate LLVM at llvm/llvm-project@4c973ae51b85

Updates LLVM usage to match
[4c973ae51b85](https://github.com/llvm/llvm-project/commit/4c973ae51b85)

PiperOrigin-RevId: 362116801

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