Turn AutomaticLifecycleMixin into a ModificationApplyOperation

The way AutomaticLifecycleMixin is plugged into the overall machinery requires subclassing and overriding of checkApplicable() and apply() methods. These are main entrypoints, which are not invoked from SchemaAwareApplyOperation, hence turning the mixin into a delegating wrapper should reduce the need for subclassing and result in better performance due to fewer implementations existing.