Function join_with_device_pairing_over_test_home 

pub async fn join_with_device_pairing_over_test_home(
    pairing: &PreparedDevicePairing,
    layout: StoreLayout,
    synced_tables: Vec<SyncedTable>,
    migrations: Vec<Migration>,
    coven_migration_policy: CovenMigrationPolicy,
    clock: ClockRef,
    home: Arc<dyn ExactCloudHome>,
    timing: DeviceJoinTransportTiming,
    on_progress: JoiningDeviceJoinProgressObserver,
    cancel: &Receiver<bool>,
) -> Result<DeviceJoinTransportOutcome, BootstrapError>

Test-only counterpart of join_with_device_pairing.