chore: turn clippy on for test code (#4817)

crates/goose/examples/databricks_oauth.rs

@@ -31,9 +31,9 @@ async fn main() -> Result<()> {
     let mut usage = Usage::default();
     while let Some(Ok((msg, usage_part))) = stream.next().await {
         dbg!(msg);
-        usage_part.map(|u| {
+        if let Some(u) = usage_part {
             usage += u.usage;
-        });
+        }
     }
     println!("\nToken Usage:");
     println!("------------");