Make CockroachDB test be able to run on secure clusters.

[DarrylWong]

The setup script for cockroachdb tests previously passed an --insecure flag. This change replaces that with a more generic ARGS flag that gives more flexibility. The test can still run on insecure clusters if --insecure is passed or on secure clusters if certs-dir is passed.

[PavloTytarchuk]

Approved.

CI/CD tests are failing with these changes.

[PavloTytarchuk]

Hello @DarrylWong! I've opened PR with your changes in our repo, to check if CI/CD builds will pass with your changes. Unfortunately build fails with: ERROR: cannot establish secure connection to insecure server.

If I remove --insecure from command: start-single-node --insecure in our docker-config, build starts to fail with: ERROR: cannot load certificates.

[DarrylWong]

Hey Pavlo, thanks for taking a look at my PR!

I went with the easiest fix of passing the --insecure flag to the ./setup_db.sh:/setup_db.sh call in docker. This should retain the previous behavior of running the tests on insecure clusters for CI, but still be an improvement as anyone who wants to (namely cockroachdb's own tests) can run on secure mode.

Let me know if my reasoning makes sense! 😄