AI catalog list: Display Unlisted badge for soft deleted items

What does this MR do and why?

AI catalog list: Display Unlisted badge for soft deleted items

Behind :global_ai_catalog feature flag

References

Screenshots or screen recordings

How to set up and validate locally

1. Prerequisite: You have a Duo workflow-enabled project.
2. Enable the feature flags global_ai_catalog and ai_catalog_item_project_curation.
3. Create and enable agent(s) in a group from the Explore AI catalog
4. Soft delete the agent
5. Go to group list and verify the badge is displaying next to the agent
6. In the Project list, the agent can be enabled, and displays the badge once enabled.

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Related to #582003