[ITCP-756] Add auto-sort Featured Articles by Publications Date

This merge request introduces a new sorting option for blocks containing featured articles, where the sorting is based on the publication date (field_published_date) of the referenced nodes, instead of relying on the order of references in the field.

Currently, in the lb_featured_articles block, when selecting manual items for display, the referenced nodes are sorted based on the order they appear in the field_manual_selection_items field. This MR changes that behavior by sorting the referenced entities according to their publication date (field_published_date), regardless of their order in the reference field.