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/HighLevelArchitecture/Common/participantinformation.cpp

@@ -10,7 +10,7 @@ ParticipantInformation::ParticipantInformation(const ParticipantManagement::Part
                                                const TypeStruct &_typestruct,
                                                const ParticipantPosition &_position)
   : participantId(participant.id())
-  , equipmentNo(participant.equipmentNumber().is_set() ? participant.equipmentNumber().get() : 0)
+  , equipmentNo(participant.equipmentNumber().has_value() ? participant.equipmentNumber().get() : 0)
   , partyId(participant.partyId())
   , parentId(participant.superiorId())
   , typeStruct(_typestruct)