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/DeveloperTools/Gui/dev_ftcmock.cpp

@@ -51,7 +51,7 @@ void FtcMock::mock()
 
     exmFtc->enableGetExerciseImage();
     auto req = ExerciseManagement::GetExerciseImageRequest();
-    req.exerciseId(42);
+    req.exerciseId = 42;
     ExerciseManagement::GetExerciseImageReply rep;
     try
     {
@@ -96,7 +96,7 @@ void FtcMock::mock()
 
 
     exmFtc->enableExerciseImageModify();
-    auto req2 = ExerciseManagement::ExerciseImageModifyRequest(42, rep.imageData());
+    auto req2 = ExerciseManagement::ExerciseImageModifyRequest(42, rep.imageData);
     try
     {