s3s-aws: it_aws: fix

async fn test_list_buckets() -> Result<()> {

    let c = Client::new(config());

    let response1 = log_and_unwrap!(c.list_buckets().send().await);

    assert!(response1.buckets().is_empty());

    drop(response1);

    let bucket1 = format!("test-list-buckets-1-{}", Uuid::new_v4());

    let bucket1_str = bucket1.as_str();