Merge google -> main #6814

* be7ef6e Merge pull request Merge main -> google #6812 from MaheshRavishankar:main-to-google
* 92d36bc Integrate LLVM at llvm/llvm-project@9ae9262
* 03f4131 Update LLVM Bazel configuration for simplified setup
* 418fe6f Integrate LLVM at llvm/llvm-project@ad0f6e1
* c963ec1 Merge pull request Merge main -> google #6804 from GMNGeoffrey:main-to-google
* 7b440b4 Integrate LLVM at llvm/llvm-project@21d91a8