Rollup merge of rust-lang#98165 - WaffleLapkin:once_things_renamings, r=m-ou-se

once cell renamings

This PR does the renamings proposed in rust-lang#74465 (comment)

- Move/rename `lazy::{OnceCell, Lazy}` to `cell::{OnceCell, LazyCell}`
- Move/rename `lazy::{SyncOnceCell, SyncLazy}` to `sync::{OnceLock, LazyLock}`

(I used `Lazy...` instead of `...Lazy` as it seems to be more consistent, easier to pronounce, etc)

```@rustbot``` label +T-libs-api -T-libs

Author: matthiaskrgr

src/driver/jit.rs

@@ -13,7 +13,7 @@ use rustc_span::Symbol;
 
 use cranelift_jit::{JITBuilder, JITModule};
 
-// FIXME use std::lazy::SyncOnceCell once it stabilizes
+// FIXME use std::sync::OnceLock once it stabilizes
 use once_cell::sync::OnceCell;
 
 use crate::{prelude::*, BackendConfig};