Replace log crate with tracing

tools/src/diagnosticsservice.rs

@@ -12,7 +12,7 @@ mod common;
 
 #[tokio::main]
 async fn main() {
-    env_logger::init();
+    tracing_subscriber::fmt::init();
 
     let matches = Command::new("remotexpc")
         .about("Gets a sysdiagnose")