SWDEV-548417 - Fix Memleaks in Graph (#973)

Command enqueued on the graph internal stream are not released add stream during graphExec release

Co-authored-by: Rahul Manocha <rmanocha@amd.com>

projects/clr/hipamd/src/hip_graph_internal.hpp

@@ -818,6 +818,7 @@ class GraphExec : public amd::ReferenceCountedObject, public Graph {
   ~GraphExec() {
     for (auto stream : parallel_streams_) {
       if (stream != nullptr) {
+        stream->finish();
         constexpr bool kForceDestroy = true;
         hip::Stream::Destroy(stream, kForceDestroy);
       }