Ready for Release

#1041

Deprecate target action support.

Deprecate TargetActionSupport Summary Deprecate send and the corresponding TargetActionSupport. Motivation These are legacy patterns that are no longer recommended in modern Ember code. The primary way to interact with this system was the now-deprecated {{action}} modifier/helper. The modern approach is to use standard class methods (optionally decorated with @action) and to pass functions directly, following the Data Down, Actions Up (DDAU) pattern. See also: Target Action Support deprecation guide Detailed design This RFC proposes to deprecate and remove the following: TargetActionSupport mixin, specifically the triggerAction method ActionHandler mixin, specifically the send method ActionSupport mixin, specifically the send method