Update linker-based LTO compatibility matrix as a part of the Rustc release process #154285

Location (URL)

https://doc.rust-lang.org/rustc/linker-plugin-lto.html#toolchain-compatibility

Summary

We already had multiple times a problem with outdated Linker-based compatibility matrix:

• Update linker-plugin-lto.md to contain up to Rust 1.65 #103955
• Linker-plugin-based LTO: update list of good combinations (inc. beta + nightly) #146827
• doc: linker-plugin-based LTO: update list of good combinations #154284

The problem is that the documentation is not updated during the Rust release process, and now it's done in some random way. That's definitely not a good way to do this.

I suggest update this page as a mandatory part of the Rustc release process - in this case, no out-of-date states will be found in the future. I don't know in which way we should do it - automatically via some script or seomhow manually - since I am not familiar with the release process. But we need to do something with it.

This information is important for Rustc users (me including), who is trying to use cross-lang LTO for Rust + C/C++ apps, we need this compatibility matrix up-to-date to not guess (aka check manually) Rustc and Clang compatibility.