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/valgrind/valgrindsettings.cpp

@@ -91,7 +91,7 @@ void SuppressionAspectPrivate::slotRemoveSuppression()
 
     Utils::sort(rows, std::greater<int>());
 
-    for (int row : qAsConst(rows))
+    for (int row : std::as_const(rows))
         m_model.removeRow(row);
 
     if (!isGlobal)