* Making saveMethod mandatory in attribute service
* Making unwrap method mandatory
* Making book embeddable respect new attribute service
* Remove savedObjectsClient from attribute service
* Add checkForDuplicateTitle method to book embeddable
* Make options mandatory on attribute service
* Changing Lens attribute service
* Somw more typescript fixes
* Fixing attribute service typescript and tests
* Fixing typescript errors
* Unsetting feature flag
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>