Integrate LLVM at llvm/llvm-project@73244e8f8568
Integrate LLVM at llvm/llvm-project@73244e8f8568

Updates LLVM usage to match
[73244e8f8568](https://github.com/llvm/llvm-project/commit/73244e8f8568)

PiperOrigin-RevId: 438384328

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