message: Move/rename `lazy::Sync{OnceCell,Lazy}` to `sync::{Once,Lazy}Lock`
diff: 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};
  