Austenem/CAT-1074 Fix protected datasets bug

[austenem]

Summary

Fix bug allowing non-public datasets to be added to workspaces.

Design Documentation/Original Tickets

CAT-1074 Jira ticket

Testing

Tested by attempting to add various combinations of public and non-public datasets from the search page to a workspace.

Checklist

• Code follows the project's coding standards
  • Lint checks pass locally
  • New CHANGELOG-your-feature-name-here.md is present in the root directory, describing the change(s) in full sentences.
• Unit tests covering the new feature have been added
• All existing tests pass
• Any relevant documentation in JIRA/Confluence has been updated to reflect the new feature
• Any new functionalities have appropriate analytics functionalities added

[john-conroy]

The issue was handling non-protected, non-public access levels such as 'consortium'?