Function diff_stream_and_batch

async fn diff_stream_and_batch(
    rng: &mut impl Rng,
    mvs_and_base_tables: Vec<Table>,
    client: &Client,
    i: usize,
) -> Result<()>

Create the tables defined in testdata, along with some mviews. Just test number of rows for now. TODO(kwannoel): Test row contents as well. That requires us to run a batch query with select * ORDER BY <all columns>.