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/libs/aggregation/aggregate.cpp

@@ -176,7 +176,7 @@ Aggregate::~Aggregate()
     QList<QObject *> components;
     {
         QWriteLocker locker(&lock());
-        for (QObject *component : qAsConst(m_components)) {
+        for (QObject *component : std::as_const(m_components)) {
             disconnect(component, &QObject::destroyed, this, &Aggregate::deleteSelf);
             aggregateMap().remove(component);
         }