Reduce the size of attribute_groups payload

[teolemon]

What

• Can we reduce the size of attribute_groups payload to the bare minimum required to show the Smoothie scan card in offline mode in eg: attribute_groups_small ?
• eg: we don't need descriptions.
• https://world-fr.openfoodfacts.org/api/v2/search?fields=attribute_groups,code,product_name,quantity,brands&page_size=1

Part of

• Server-side support for Offline scanning mode #6988
• Product Attributes (tracker) #5515

Screenshot

![image](https://user-images.githubusercontent.com/1689815/178789769-bb626679-fdcb-49bf-b

Part of

• Product Attributes (tracker) #5515
  143-19d710b7dc98.png)

[stephanegigandet]

We have https://world-fr.openfoodfacts.org/api/v2/search?fields=attribute_groups_data,code,product_name,quantity,brands&page_size=1
No titles though.

[github-actions]

This issue is stale because it has been open 90 days with no activity.