Auto merge of #109561 - raphamorim:master, r=cuviper

Use llvm 16.0.0 instead of 16.0.0-rc4 for build-clang.sh

Ref: rust-lang/rust#107224

This PR doesn't make any update on LLVM submodule used by Rust repo, but would be super keen to update it, if necessary (https://rustc-dev-guide.rust-lang.org/backend/updating-llvm.html). LLVM 16.0.0 has been [released](https://discourse.llvm.org/t/llvm-16-0-0-release/69326) on March 18, while Rust 1.70 will become stable on June 1.

- https://releases.llvm.org/16.0.0/docs/ReleaseNotes.html