Running `./ci/long_running_tests/start_workloads.sh` will start several workloads running (each in their own EC2 instance).
- The workloads run forever.
- The workloads all simulate multiple nodes but use a single machine.
- You can get the tail of each workload by running `./ci/long_running_tests/check_workloads.sh`.
- You have to manually shut down the instances.
As discussed with @ericl @richardliaw, the idea here is to optimize for the debuggability of the tests. If one of them fails, you can ssh to the relevant instance and see all of the logs.
