style(rust): Format all Rust code with rustfmt

Change-Id: Iab7e00cc26a4f9727d3ab98691ef379921a33052
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5240
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: tazjin <tazjin@tvl.su>

ops/journaldriver/build.rs

@@ -1,6 +1,5 @@
 extern crate pkg_config;
 
 fn main() {
-    pkg_config::probe_library("libsystemd")
-        .expect("Could not probe libsystemd");
+    pkg_config::probe_library("libsystemd").expect("Could not probe libsystemd");
 }