Airbyte Cloud: Remove (or handle) default workspace

[cgardens]

Tell us about the problem you're trying to solve

The OSS platform automatically creates a workspace with a hardcoded workspace id. That id is used in many places. We will start having multiple workspaces as a first class citizen in Airbyte Cloud.

Describe the solution you’d like

There's a fundamental choice that needs to be made here: Either remove the default entirely or just figure out how to make it sane in cloud. The data model should stay the same across OSS and cloud.

Here are the requirements that whatever choice that is made needs to meeting

• In cloud allow a user to sign up and create a workspace with a random id.
• All product tracking should be able to work for workspaces without the random id.

If we keep the default workspace concept, we will need to audit all usages and make sure they make sense.

If we drop the default workspace concept, do we reassign existing workspace ids in the OSS version to new, randomly generated ones?