these tests are timing out en-mass on many runs, e.g. https://github.com/coder/coder/actions/runs/2502674150/attempts/2

Need to investigate, but some possible issues:

• we set parallel=1 and timeout=5m --- are these tests just taking too long?
• are any postgres workers getting OOM killed?
• are there deadlocks in parallel tests?
• does it matter that we don't clean up test databases when test runs are over?