Function insert_step_test_case 

pub async fn insert_step_test_case<'a, E>(
    executor: E,
    run_id: Uuid,
    step_instance_id: Uuid,
    report_name: &str,
    test_case: &TestCase,
) -> Result<PgQueryResult, Error>
where
    E: Executor<'a, Database = Postgres>,

Insert step test case.