rls no longer builds after rust-lang/rust#60296

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR #60296, I observed that the tool rls no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/rls is needed to fix the fallout.

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

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

[Centril]

I looked at the rollup but I don't know why this happened; it would be nice if highfive tried to highlight the source for each failed tool.

[phansch]

@Centril I think this may be because of Clippy not because of RLS as Clippy fails to compile since the rollup. I had a quick look but ran out of time for today. We essentially have to correctly handle the new ExprKind::Use in Clippy.

(also: the toolstate script doesn't seem to create the Clippy issue automatically?)

[carols10cents]

i'm not sure why the book failed either, is that because of clippy too? can you tell me where to look @phansch ?

[pnkfelix]

(cc'ing #59761 since that proposes decoupling RLS from Clippy, which might lessen instances of this.)

[pnkfelix]

triage: I do not know what priority to assign here. Leaving explicitly unprioritized and nominated for now (so that hopefully at rustc meeting we can collectively determine a priority).

[pnkfelix]

but also, if the issue here is that Clippy needs to be updated, then shouldn't this be tagged with T-dev-tools? Adding that now.

[Xanewok]

@pnkfelix can we close this specific issue? RLS is fixed and available again