fix: Microsoft.Bot.Builder.TestBot.Json can't start (#5718)

* init

* init

* revert some code

* fix testbot.json

tests/Microsoft.Bot.Builder.TestBot.Json/Startup.cs

@@ -44,6 +44,7 @@ public void ConfigureServices(IServiceCollection services)
             services.AddSingleton<AuthenticationConfiguration>();
 
             // register components.
+            ComponentRegistration.Add(new DialogsComponentRegistration());
             ComponentRegistration.Add(new DeclarativeComponentRegistration());
             ComponentRegistration.Add(new AdaptiveComponentRegistration());
             ComponentRegistration.Add(new LanguageGenerationComponentRegistration());