function isFetchable (service) {
  return Boolean(
    (service?.openapi && service.openapi.url) || service?.graphql
  )
}
detect if a service if fetchable, so if it has configuration to retrieve schema info (openapi or gql)
a service can have openapi and/or gql either from a remote service or from file
note service.origin is always been set if missing at index.js/platformaticComposer
@returns {boolean}