(ai_translate) One click translations for Layout builder

Problem/Motivation

The main functionality does support
- Paragraphs and fields (this was built in https://www.drupal.org/project/ai/issues/3464024#comment-15720929 ✨ (ai_translate) One click translations for Paragraphs Needs review )
but not
- Layout builder.

Steps to reproduce

Create a page in aCT with Layout builder enabled.
Creater a nice layout with multiple text in blocks.
Navigate to the translate page
click on "Translate using GPT"
The Blocks will not be (but should be) translated.

Proposed resolution

Make it so layouts get translated too on the clicking of the button.

Remaining tasks

User interface changes

API changes

Data model changes