"services" cannot be used right now because now container depends on the
repository already checkedout, while this is not true for "services".

Fix this by manually starting docker as a separate step.

CI reports [1]:

    ---- pool::test::test_many_connection stdout ----
    thread 'pool::test::test_many_connection' panicked at src/pool/mod.rs:380:9:
    assertion failed: spent < Duration::from_millis(2500)

  [1]: https://github.com/azat-rust/clickhouse-rs/actions/runs/7323232432/job/19945622315?pr=1

…blems)

…t_concurrent_queries)