rustfmt no longer builds after rust-lang/rust#65076

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #65076, I observed that the tool rustfmt no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/rustfmt is needed to fix the fallout.

cc @tmandry, do you think you would have time to do the follow-up work?
If so, that would be great!

cc @tmandry, the PR reviewer, and @rust-lang/compiler -- nominating for prioritization.

[tesuji]

Breakage by #64690

[ghedo]

@topecongiro looks like rustfmt has been fixed, is there anything else blocking an update of rustfmt here? I can create the PR if you are busy :)

[topecongiro]

@ghedo We need to update rls and rustfmt at the same time because the rustc repository forbids tools to depend on multiple rustc-ap-* crates at once. So this is blocked by #65084.

[pnkfelix]

triage: P-high. Removing nomination label.