Improve CI

[gagdiez]

Is your feature request related to a problem? Please describe. With the addition of the --useFaucet flag, I changed the tests to run on testnet directly. This creates a multitude of problems, since we can hit a rate limit, or run into errors that go away if we just re-run the tests.

Describe the solution you'd like Migrate all tests to use workspaces, or maybe go back to the shared-test network, and test --useFaucet separately (most probably this last one is the simplest one)