convert circleci tests to more easily run locally

[daler]

Currently the circleci tests have lots of configuration and commands that only live in that config file. This makes it hard to test everything locally, especially when trying to test large datasets.

I'd like to have some easier way of setting up and running these tests such that they can be run from the command line on a local machine -- for example a lcdb-wf-test script that can be run like lcdb-wf-test rnaseq-misc to run the rnaseq-misc step.

I don't think we need to recapitulate the dependencies of the circleci config file. Just need to make it easier somehow to run those tests.

Once something is working, we can replace the circleci config with those shorter commands so that the actual tests are only maintained in a single place.

[daler]

This is being worked on in #366