Synchronize submodules with LLVM at llvm/llvm-project@de7a4e53a22b

Updates LLVM dependencies to match
[de7a4e53a22b](https://github.com/llvm/llvm-project/commit/de7a4e53a22b).
- TensorFlow to
  [c9d6f6f031f5](https://github.com/tensorflow/tensorflow/commit/c9d6f6f031f5)
- MLIR-HLO to
  [2e03bc727af8](https://github.com/tensorflow/mlir-hlo/commit/2e03bc727af8)

`./scripts/git/update_to_llvm_syncpoint.py `

PiperOrigin-RevId: 387004099