Increase Grpc InteropTests timeout (#60471)

Author: BrennanConroy

src/Grpc/Interop/test/InteropTests/InteropTests.cs

@@ -11,7 +11,7 @@ namespace InteropTests;
 // Tests are separate methods so that they can be quarantined separately.
 public class InteropTests
 {
-    private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(30);
+    private static readonly TimeSpan DefaultTimeout = TimeSpan.FromSeconds(60);
     private readonly string _clientPath = Path.Combine(Directory.GetCurrentDirectory(), "InteropClient", "InteropClient.dll");
     private readonly string _serverPath = Path.Combine(Directory.GetCurrentDirectory(), "InteropWebsite", "InteropWebsite.dll");
     private readonly ITestOutputHelper _output;