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/autotest/projectsettingswidget.cpp

@@ -111,7 +111,7 @@ void ProjectTestSettingsWidget::populateFrameworks(const QHash<ITestFramework *,
         item->setData(0, BaseTypeRole, frameworkOrTestTool->type());
     };
 
-    for (ITestFramework *framework : qAsConst(sortedFrameworks))
+    for (ITestFramework *framework : std::as_const(sortedFrameworks))
         generateItem(framework, frameworks.value(framework));
 
     // FIXME: testTools aren't sorted and we cannot use priority here