Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/Lts/Plugins/PlanEditor/mil2525d_to_mil2525c.cpp

@@ -57,7 +57,7 @@ class Converter::Internal
   {
     if (line.isEmpty()) return true;
 
-    QVector<QStringRef> tokenList = line.splitRef(QLatin1Char(';'));
+    QList<QString> tokenList = line.split(QLatin1Char(';'));
 
     QRegularExpression sidcTemplate(QStringLiteral("^[A-Z]{1,1}\\*[A-Z]+[\\-\\*X]+$"));
     QString sidc;
@@ -77,7 +77,7 @@ class Converter::Internal
     if (sidc.isEmpty()) return true;
 
     bool               isNumber  = false;
-    const QStringRef &code2525d = tokenList.last();
+    const QString &code2525d = tokenList.last();
     unsigned int       code      = code2525d.toUInt(&isNumber);
 
     if (!isNumber)
@@ -87,7 +87,7 @@ class Converter::Internal
 
     if (m_2525dToSidc.contains(code)) return true;
 
-    QStringRef kindOfRubberband;
+    QString kindOfRubberband;
 
     foreach (auto token, tokenList)
     {