core: z_datamodel: Allow predicates to be of a different category
core: z_datamodel: Allow predicates to be of a different category

So they can be of a subcategory of predicate.

erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta