Summary

Following up the work we did for the rest of the blocks, we can also move Covers block code to master theme.

Requirements

• Move Covers block code to master theme.
• Migrate any additional dependencies it may need.
• Follow the code/folder structure of other blocks already in the theme.
• Clean up blocks plugin code from any redundant code.
• The block should be tied to the Planet 4 Blocks feature flag.
• This only refers to Content and Take Action styles, as the Campaign should have already been phased out as part of PLANET-7489