Refactor: replace qAsConst with std::as_const across TetraIF; reduce compiler deprecation warnings

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

TetraIF/PrtCnv/LastTestAuswertung/mainwindow.cpp

@@ -326,7 +326,7 @@ int MainWindow::auswerten()
   int fehlcount = 0;
   QVector<uint> numList;
   int i = 0;
-  for (const QString &issi : qAsConst(issis))
+  for (const QString &issi : std::as_const(issis))
   {
     
     numList.clear();