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/UAS/from_tab.h

@@ -7,6 +7,7 @@
 #include <TrainingAreaBase/send_to_tab.h>
 #include <TrainingAreaBase/dds_handler.h>
 #include <ParticipantManagement/ppm.hpp>
+#include <ParticipantManagement/ppm_dtc.h>
 
 
 namespace ProjectDataManagement { namespace Interface { class Dtc; } }