Integrate LLVM at llvm/llvm-project@6648414b2b7d
Integrate LLVM at llvm/llvm-project@6648414b2b7d

Updates LLVM usage to match
[6648414b2b7d](https://github.com/llvm/llvm-project/commit/6648414b2b7d)

PiperOrigin-RevId: 339727680

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