Changes to Save cluster-wide Auto Tune backoff/notification config

the trigger_action request property const value rollback was added

removed the enum value disable of the request property backoff_policy/trigger_action

removed the enum value no_action of the request property backoff_policy/trigger_action

removed the enum value revert_to_original of the request property backoff_policy/trigger_action

removed the enum value rollback of the request property backoff_policy/trigger_action

the trigger_action response property const value rollback was added for the status 200

removed the disable enum value from the backoff_policy/trigger_action response property for the response status 200

removed the no_action enum value from the backoff_policy/trigger_action response property for the response status 200

removed the revert_to_original enum value from the backoff_policy/trigger_action response property for the response status 200

removed the rollback enum value from the backoff_policy/trigger_action response property for the response status 200

removed the request property backoff_policy/stability_period_days

removed the optional property backoff_policy/stability_period_days from the response with the 200 status

endpoint added