[UR][L0] Move async pool cleanup after queue sync (#18331)

In a scenario where the AsyncPool freelist contains an entry tied to a
free event that hasn't completed yet, performing freelist cleanup before
queue sync can result in freeing memory that's actively in use.

Author: kswiecicki

unified-runtime/source/adapters/level_zero/queue.cpp

@@ -615,8 +615,6 @@ ur_result_t urQueueRelease(
       return UR_RESULT_SUCCESS;
     }
 
-    Queue->Context->AsyncPool.cleanupPoolsForQueue(Queue);
-
     // When external reference count goes to zero it is still possible
     // that internal references still exists, e.g. command-lists that
     // are not yet completed. So do full queue synchronization here
@@ -630,6 +628,9 @@ ur_result_t urQueueRelease(
     if (Res == UR_RESULT_SUCCESS)
       UR_CALL(Queue->synchronize());
 
+    // Cleanup the allocations from 'AsyncPool' made by this queue.
+    Queue->Context->AsyncPool.cleanupPoolsForQueue(Queue);
+
     // Destroy all the fences created associated with this queue.
     for (auto it = Queue->CommandListMap.begin();
          it != Queue->CommandListMap.end(); ++it) {