Remove `displaySetupWizard` from workspace

[timroes]

Since https://github.com/airbytehq/airbyte/pull/19539/files we removed the onboarding page from the webapp. We could now remove displaySetupWizard which was used to track if the onboarding page should still be shown, from the backend and APIs as well, or at least deprecate it.

There are still some places this type appears in the FE, which can all safely be removed with the removal from the API.

[krishnaglick]

Moving this over to the compose team as I don't believe it falls in our bucket.

[vershwal]

Hey @timroes @krishnaglick I am a new contributor here in this project.
This looks like a clean up tasks. Can I pick this up?

[krishnaglick]

I believe so.
I'd also argue we should remove Workspace and replace its usages with WorkspaceRead from AirbyteClient.ts (which is generated on build).
Workspace is only used in airbyte-webapp/src/services/workspaces/WorkspacesService.tsx so it should be easy to include.

[vershwal]

Okay, @krishnaglick I'll start on this task. I'll get back to you if I have any doubts