SWDEV-357759, SWDEV-360041, SWDEV-361145 Fix Stream end capture on forked streams

Change-Id: If0dc6242d2d3ca680e37e14a5dea5cf68dc295df

hipamd/src/hip_graph_internal.cpp

@@ -493,6 +493,7 @@ void ihipGraph::AddNode(const Node& node) {
 
 void ihipGraph::RemoveNode(const Node& node) {
   vertices_.erase(std::remove(vertices_.begin(), vertices_.end(), node), vertices_.end());
+  delete node;
 }
 
 // root nodes are all vertices with 0 in-degrees