Function complete_step_instance 

pub async fn complete_step_instance<'a, E>(
    executor: E,
    status: &StepStatus,
    exit_code: Option<i32>,
    runner_id: Option<&str>,
    id: Uuid,
) -> Result<PgQueryResult, Error>
where
    E: Executor<'a, Database = Postgres>,

Complete step instance.