Reworks CMake wiring for Qt6 codegen include order

Adds missing toolchain packages and include dirs so generated headers resolve.

qt6-after/qt6-migrated-legatus/cmake/MacroCodeGenIdl.cmake

@@ -446,6 +446,11 @@ MACRO(CREATE_TOPIC_TYPE_PLUGIN xmlFile_in)
     topic_type_plugin
     routing_plugin
     ddscore
+    ddsftccore
+    # The generated *_topic_type_plugin.cpp includes generic_fts_impl.h
+    # -> generic_fts_internal.h -> "ddsfts_export.h". Linking ddsfts also
+    # propagates its exported include dirs (source and binary dir).
+    ddsfts
     ${_commonLib}
   )
   NGL_INSTALL_TARGET(${svcNameOut}TopicTypePlugin)