Allow to render different view modes per entity type in BuildFieldTrait::buildReferencedEntities

Let's keep the API as is. We can introduce new methods, `buildReferencedEntitiesWithViewModes` and `buildEntitiesWithViewModes` .

So we don't end up with one argument acting in different ways.

I modified the code in drupal-starter.

This is how quotes are loaded... Rest of paragraphs are rendered using the full view mode:

Merged, thanks!