CI coverage for batch launchers

We have CI coverage for batch through SLURM, but not the other batch launchers (beyond template generation).

[dask-jobqueue][] has CI for most of our supported batch systems, deployed via docker-compose. We could adapt their setup to get proper exercise of all of most of our supported cluster types.

[dask-jobqueue]: https://github.com/dask/dask-jobqueue/tree/0.7.3/ci

It should mostly be a find-replace of installing dask to installing ipyparallel, since all the cluster setup itself should be reusable.