DRAFT: Add provision sqlalchemy

[susodapop]

DRAFT: This scaffolds in the code for running parallel dialect compliance tests. Setting this up isn't documented anywhere and the implementation here doesn't actually work because the test runner keeps trying to create tables within the catalog.schema in the connection string.

Need to research more about why this happens. But wanted to stash this code for now as we'll want to address this for faster compliance test runs in the future.