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/boost/boosttesttreeitem.cpp

@@ -182,7 +182,7 @@ QList<ITestConfiguration *> BoostTestTreeItem::getAllTestConfigurations() const
     });
 
     for (auto it = testsPerProjectfile.begin(), end = testsPerProjectfile.end(); it != end; ++it) {
-        for (const QString &target : qAsConst(it.value().internalTargets)) {
+        for (const QString &target : std::as_const(it.value().internalTargets)) {
             BoostTestConfiguration *config = new BoostTestConfiguration(framework());
             config->setProject(project);
             config->setProjectFile(it.key());