SWDEV-247372 - Reset hasPendingDispatch

Reset hasPendingDispatch_ if we insert barrier for time marker.

Change-Id: Id038fd4e1c910c0a657978fee00630e49c372321

rocclr/device/rocm/rocvirtual.cpp

@@ -2930,6 +2930,8 @@ void VirtualGPU::submitMarker(amd::Marker& vcmd) {
     if (timestamp_ != nullptr) {
       // Submit a barrier with a cache flushes.
       dispatchBarrierPacket(kBarrierPacketHeader);
+      // Reset this flag since we already enable system scope for kBarrierPacketHeader
+      hasPendingDispatch_ = false;
     }
     profilingEnd(vcmd);
   }