SWDEV-460770 - Handle Graph Exec release

Handle GraphExec instance is destroyed before async launch completes
GraphExec instance is destroyed after async launch completes
GraphExec instance is destroyed without a launch

Change-Id: I45a7c82295fea916c7559bd8f796df710513aea1

hipamd/src/hip_stream.cpp

@@ -343,10 +343,14 @@ hipError_t hipStreamSynchronize_common(hipStream_t stream) {
   constexpr bool kDontWaitForCpu = false;
 
   auto hip_stream = hip::getStream(stream, wait);
-
   // Wait for the current host queue
   hip_stream->finish(kDontWaitForCpu);
-
+  if (stream == nullptr) {
+    // null stream will sync with other streams.
+    ReleaseGraphExec(hip_stream->DeviceId());
+  } else {
+    ReleaseGraphExec(hip_stream);
+  }
   // Release freed memory for all memory pools on the device
   hip_stream->GetDevice()->ReleaseFreedMemory();
   return hipSuccess;