Port from qAsConst() to std::as_const()

We've been requiring C++17 since Qt 6.0, and our qAsConst use finally
starts to bother us (QTBUG-99313), so time to port away from it
now.

Since qAsConst has exactly the same semantics as std::as_const (down
to rvalue treatment, constexpr'ness and noexcept'ness), there's really
nothing more to it than a global search-and-replace.

Task-number: QTBUG-99313
Change-Id: I88edd91395849574436299b8badda21bb93bea39
Reviewed-by: hjk <hjk@qt.io>

src/plugins/qmldesigner/components/connectioneditor/dynamicpropertiesmodel.cpp

@@ -638,7 +638,7 @@ void DynamicPropertiesModel::addModelNode(const ModelNode &modelNode)
         return a.name() < b.name();
     });
 
-    for (const AbstractProperty &property : qAsConst(dynamicProperties)) {
+    for (const AbstractProperty &property : std::as_const(dynamicProperties)) {
         if (property.isBindingProperty())
             addBindingProperty(property.toBindingProperty());
         else if (property.isVariantProperty())