perf: multithreading in updateTargetList in all events (#3074)

Previously, the multithreading of updateTargetList only worked for walk
events, now all requests to these methods will be executed async.

src/creatures/monsters/monster.cpp

@@ -602,7 +602,7 @@ bool Monster::removeTarget(const std::shared_ptr<Creature> &creature) {
 }
 
 void Monster::updateTargetList() {
-	if (g_dispatcher().context().getGroup() == TaskGroup::Walk) {
+	if (!g_dispatcher().context().isAsync()) {
 		setAsyncTaskFlag(UpdateTargetList, true);
 		return;
 	}