Add CreateNoWindow=true to ProcessUtil.Run to fix flashing console windows on Windows

Co-authored-by: captainsafia <1857993+captainsafia@users.noreply.github.com>

Author: Copilot

src/Aspire.Hosting/Dcp/Process/ProcessUtil.cs

@@ -29,6 +29,7 @@ public static (Task<ProcessResult>, IAsyncDisposable) Run(ProcessSpec processSpe
                 RedirectStandardOutput = true,
                 RedirectStandardError = true,
                 UseShellExecute = false,
+                CreateNoWindow = true,
                 WindowStyle = ProcessWindowStyle.Hidden,
             },
             EnableRaisingEvents = true