Update from debian/bullseye-security for apertis/v2023-security

Before being able to merge this one, we need to merge some MRs in the following order:

1. llvm-toolchain-16!1 (merged)
2. rustc-web!1 (merged)
3. rustc-web!3 (merged)
4. rust-cbindgen-web!1 (merged)
5. !227 (merged)