Core/Misc: don't allow FindNearestCreature() and FindNearestGameObject() searches to return the entity that called them. (#23437)

Closes #23334.

(cherry picked from commit 015870bfe1d3ec57c4505072f087b88fe63662b5)

src/server/game/Grids/Notifiers/GridNotifiers.h

@@ -797,7 +797,7 @@ namespace Trinity
 
             bool operator()(GameObject* go)
             {
-                if (go->GetEntry() == i_entry && i_obj.IsWithinDistInMap(go, i_range))
+                if (go->GetEntry() == i_entry && go->GetGUID() != i_obj.GetGUID() && i_obj.IsWithinDistInMap(go, i_range))
                 {
                     i_range = i_obj.GetDistance(go);        // use found GO range as new range limit for next check
                     return true;
@@ -1347,6 +1347,7 @@ namespace Trinity
                 if (u->getDeathState() != DEAD
                     && u->GetEntry() == i_entry
                     && u->IsAlive() == i_alive
+                    && u->GetGUID() != i_obj.GetGUID()
                     && i_obj.IsWithinDistInMap(u, i_range)
                     && u->CheckPrivateObjectOwnerVisibility(&i_obj))
                 {