Fix flacky test

profiler/test/Datadog.Profiler.IntegrationTests/Helpers/AgentEtwProxy.cs

@@ -164,7 +164,7 @@ private async Task<bool> ProcessCommand(byte[] receivedData)
                 {
                     // NOTE: we want to accept the profiler registration command before starting to send events from another thread
                     //       so we don't await this async method
-                    StartClientAsync();
+                    Task.Run(() => StartClientAsync());
                 }
 
                 return _profilerHasRegistered;