feat(Core/SAI): SetData now has invoker (#19296)

* cherry-pick commit (cfc77fd843)

* cherry-pick commit (beb333738d)

* Move IsSmart function from headerfile

Co-authored-by: Treeston <14020072+Treeston@users.noreply.github.com>
Co-authored-by: Shauren <shauren.trinity@gmail.com>

src/server/game/AI/ScriptedAI/ScriptedCreature.h

@@ -25,8 +25,6 @@
 #include "InstanceScript.h"
 #include "TaskScheduler.h"
 
-#define CAST_AI(a, b)   (dynamic_cast<a*>(b))
-
 typedef std::list<WorldObject*> ObjectList;
 
 class InstanceScript;