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/Viewer/SituationMap/ArcGISQt5Hack/arcgisqt5hack.cpp

@@ -0,0 +1,21 @@
+/**
+ * @RDE_HEADER@
+ * Small hack to provide the missing smybol to 'typeinfo for std::bad_array_new_length@Qt_5'
+ * $Id$
+ * $HeadURL$
+ * $Author$
+ */
+#ifdef WIN32
+__declspec(dllexport) int foo42(int) { return 42;} // just a dummy to get windows build running
+#else
+#include <new>
+
+extern "C++"
+{
+__attribute__((visibility("default"))) void operator delete(void* ptr, std::size_t) noexcept
+{
+  ::operator delete(ptr);
+}
+}
+
+#endif