Create an ingredients_origins structure from labels / origins like "French pork", "Cocoa from Ecuador"

[stephanegigandet]

What

• We have a number of labels that indicate a specific ingredient comes from a specific origin. The origins (taxonomized) and origin (free text) fields can also contain similar indications.
• It would be very useful to use those indications to populate a ingredients_origins map:

 {
 "en:milk" => "en:france",
 "en:cocoa" => "en:ecuador"
 }

• That we could then use when we do ingredients analysis, to fill the origin of the matching ingredients. This in turn would be used for the Eco-Score computations.
• For the labels, we can specify which ingredient and which origin is specified:

fr:Soja Français, Soja de France, Filière Soja Français
origins:en: en:france
ingredients:en: en:soy

• And for the free text origins, we can try to recognize country names and adjectives + ingredients.

Part of

• Add more ingredient analysis (tracker) #5706