Fixes#5276.
Updates were not triggering a cache version incrementation because they
do not trigger migrations while that is where the caching version logic
was.
We have decided to move the cache incrementation logic to the services.
## Context
Because creating an object in metadata also generates a graphql type and
because graphql does not allow 2 types with the same name, we have to
manage a list of reserved keywords that can't be used as object names.
Currently we were maintaining a list of the core objects but we also
have to introduce composite fields that are also generated as gql types.
Marie