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/Proxies/TrainingAreaBase/Plugins/WlsTetra/plugin.h

@@ -19,6 +19,7 @@ public:
   std::shared_ptr<TrainingAreaBase::Plugin::Interface> createInterface(TrainingAreaBase::Plugin::DataProvider *pdp,
                                                                        const std::shared_ptr<TrainingAreaBase::RecvFromTab> &recvFromTabCb,
                                                                        const std::shared_ptr<TrainingAreaBase::TxMixin> &sendToTabCb,
+                                                                       const std::shared_ptr<TrainingAreaBase::DdsHandler> &ddsHandler,
                                                                        NGL::Settings *settings) override;
 };