Re-configure Open Food Facts indexation

[alexgarel]

We changed the way we handle synonyms and this change the way we should build the configuration file for Open Food Facts.

Also we want to index more fields as current file was more a testbed for the implementation.

So we need to re-create the openfoodfacts configuration file.

A selection of fields to take is available here: https://docs.google.com/spreadsheets/d/1UvmyzKOYdUwu_NqoD1_gHoNb_TOhCoYRu31U6cqlTIQ/edit?gid=0#gid=0

The schema change will require a full re-indexation.