Views: Fix rendering rows to leverage the CE generator

oh, this seems great and should solve json-rendering for entities, much simpler than 📌 Improve CustomElement::createFromRenderArray() to better handle entites that render to custom elements Active I had planed for. And more efficient!

Not sure what would be a good custom-element to use for rendering a row-plugin with fields, but that can be optimized in a follow-up.

Merged:
https://git.drupalcode.org/project/lupus_decoupled/-/commit/2cf16ca6d3e7...

Automatically closed - issue fixed for 2 weeks with no activity.