remove k8s configs, update worker for multi-languages support, add local-submit option

src/LiquidCode.Tester.Gateway/Services/WorkerClientService.cs

@@ -79,6 +79,7 @@ public class WorkerClientService : IWorkerClientService
             "java" => _configuration["Workers:Java"],
             "kotlin" => _configuration["Workers:Kotlin"],
             "c#" => _configuration["Workers:CSharp"],
+            "python" => _configuration["Workers:Python"],
             _ => throw new NotSupportedException($"Language {language} is not supported")
         };