This PR adds a command to view the provisioner and agent logs for a
given workspace.
Note: I did investigate using the existing `cliui` methods to tail the
logs but they are tailored to a very specific use-case.
Other changes:
- Adds `Agents` to `dbfake.WorkspaceResponse`
- Adds methods to generate provisioner and agent logs in `dbgen`
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Co-authored-by: Steven Masley <Emyrk@users.noreply.github.com>
Cian Johnston