Summary

Following up from PLANET-7745, we should bring back the tags on the list layout where we don't have clutter issues with a limited amount of tags.

Requirements

• Show tags on Posts List block list layout, same it used to look (see screenshots).
• Tags should show up on list layout on on all instances of the Post list block, including listing pages and related posts.
• We should limit to 5 tags to show.
• Add migration script to update existing Posts List blocks.