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

[zamazan4ik]

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We already had multiple times a problem with outdated Linker-based compatibility matrix: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I suggest update this page as a mandatory part of the Rustc release process - in this case, no out-of-date states will be found in the future.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.

[zamazan4ik]

By the way, I don't understand why the linked documentation page shows only compatibility matrix up to Rust 1.92, since my PR bumps the page from 1.93 to 1.94 (1.93 already existed in the codebase), and 1.93 is definitely stable right now :) did we forget to deploy the updated version of the page?