Reformat use declarations.

The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.

compiler/rustc_data_structures/src/jobserver.rs

@@ -1,9 +1,8 @@
-pub use jobserver_crate::Client;
-
-use jobserver_crate::{FromEnv, FromEnvErrorKind};
-
 use std::sync::{LazyLock, OnceLock};
 
+pub use jobserver_crate::Client;
+use jobserver_crate::{FromEnv, FromEnvErrorKind};
+
 // We can only call `from_env_ext` once per process
 
 // We stick this in a global because there could be multiple rustc instances