Fix vegetarian ingredients analysis

[jusdekiwi]

What

• Some products are labelled "maybe vegetarian" because one ingredient can be vegetarian or not, even if all the ingredients constituting it are vegetarian.

• Example: On the image below, the mustard is known as vegetarian:maybe, but all the ingredients constituting it are vegetarian:yes, so it should be recognised, in this case, as vegetarian friendly. But it's not!

Expected behavior

• The analysis should be based of the constituting ingredients of a given ingredient, when they are available.

A similar issue was created for the vegan ingredients analysis: #8849

[jusdekiwi]

Example of a product facing that issue: https://world.openfoodfacts.org/product/27056349/vinaigrette-pesto-bourg

[ArturLange]

AFAIK compound ingredients like mustard should be marked with vegetarian:ignore, right? That way it depends only on the ingredients they consist of.