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/clearcase/clearcaseplugin.cpp

@@ -523,7 +523,7 @@ QString ClearCasePluginPrivate::ccManagesDirectory(const FilePath &directory) co
     if (vobs.empty())
         vobs = getVobList();
 
-    for (const QString &relativeVobDir : qAsConst(vobs)) {
+    for (const QString &relativeVobDir : std::as_const(vobs)) {
         const QString vobPath = QDir::cleanPath(rootDir + QDir::fromNativeSeparators(relativeVobDir));
         const bool isManaged = (vobPath == directory.toString())
                 || directory.isChildOf(FilePath::fromString(vobPath));