Update getAllDatasetPreview use case to include 'Unpublished' publication status

[ekraffmiller]

In the SPA, we need to identify objects that have never been published, distinct from draft versions of previously published objects. This is required to show the 'Unpublished' label in the SPA. The label is used in the search results of the Collection Page.

There is an issue in the Dataverse API to add this to the search results: https://github.com/IQSS/dataverse/issues/10733