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/projectexplorer/projectnodes.cpp

@@ -66,7 +66,7 @@ static FolderNode *recursiveFindOrCreateFolderNode(FolderNode *folder,
         parts[0].prepend('/');
 
     ProjectExplorer::FolderNode *parent = folder;
-    for (const QString &part : qAsConst(parts)) {
+    for (const QString &part : std::as_const(parts)) {
         path = path.pathAppended(part);
         // Find folder in subFolders
         FolderNode *next = parent->folderNode(path);