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/Services/ExerciseManagement/ModuleTests/CMakeLists.txt

@@ -51,6 +51,7 @@ IF(BUILD_TESTING AND TARGET svcExmClient)
     ngltools
     Qt6::Core
     Qt6::Test
+    $<IF:$<TARGET_EXISTS:Qt6::StateMachine>,Qt6::StateMachine,>
     svcCoreClient
     svcExmCommon
     svcExmServer