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/CoreAI/UnitAI.h

@@ -23,6 +23,17 @@
 #include "Unit.h"
 #include <list>
 
+#define CAST_AI(a, b)   (dynamic_cast<a*>(b))
+#define ENSURE_AI(a,b)  (EnsureAI<a>(b))
+
+template<class T, class U>
+T* EnsureAI(U* ai)
+{
+    T* cast_ai = dynamic_cast<T*>(ai);
+    ASSERT(cast_ai);
+    return cast_ai;
+}
+
 class Player;
 class Quest;
 class Unit;