apply ld-wrapper to rust-lld

[liketechnik]

Since the 2024-05-18 nightly, rust defaults to its own rust-lld linker, which doesn't work by default on NixOs (rust-lang/rust#125321).

The problem has been fixed in:

• mk-component-set: apply ld-wrapper for rust-ld oxalica/rust-overlay#171
• rustup: addressing a series of issues encountered while using Rust's self-contained ld.lld NixOS/nixpkgs#314268

for the respective nix specific rust toolchain providers.

For fenix, builds using a nightly at least as recent as 2024-05-18 builds (at least on x86_64 linux) fail with the error visible in the first linked issue.

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I'm unfortunately not knowledgeable enough to know where/how to apply the fix(es) that have been found to fenix, otherwise I'd be glad to help implement this for fenix too.