Synchronize submodules with LLVM at llvm/llvm-project@03512ae9bf31

Updates LLVM dependencies to match
[03512ae9bf31](https://github.com/llvm/llvm-project/commit/03512ae9bf31).
- TensorFlow to
[311eea67bacf](https://github.com/tensorflow/tensorflow/commit/311eea67bacf)
- MLIR-HLO to
[b718c9ea0586](https://github.com/tensorflow/mlir-hlo/commit/${MLIR_HLO_SHA?})

`./scripts/git/update_to_llvm_syncpoint.py`

Automated submodule bump from .github/workflows/update_llvm_dependent_submodules.yml

PiperOrigin-RevId: 395303373