Ignore objects with class names starting with #

@peller

"cherry-pick" from 4861aafa

source/RobotAPI/libraries/armem_objects/server/instance/Segment.cpp

@@ -1119,6 +1119,12 @@ namespace armarx::armem::server::obj::instance
 
         for (const auto& object : scene.objects)
         {
+            if (simox::alg::starts_with(object.className, "#"))
+            {
+                // marked to be ignored
+                continue;
+            }
+
             const ObjectID classID = object.getClassID(objectFinder);
 
             objpose::ObjectPose& pose = objectPoses.emplace_back();