Add http response status code to org.eclipse.jetty.server.RequestLog (#12116)

* Add http response status code to org.eclipse.jetty.server.RequestLog

* http response code is expressed as an int. Set log msg interpolation based on digit

* trying to add an unit test to verify if the logger.debug method is called

* trying to add an unit test to verify if the logger.debug method is called

* fix compilation issues

* remove test

server/src/main/java/org/apache/druid/server/initialization/jetty/JettyRequestLog.java

@@ -35,11 +35,12 @@ public class JettyRequestLog extends AbstractLifeCycle implements RequestLog
   {
     if (logger.isDebugEnabled()) {
       logger.debug(
-          "%s %s %s %s",
+          "%s %s %s %s %d",
           request.getRemoteAddr(),
           request.getMethod(),
           request.getHttpURI().toString(),
-          request.getProtocol()
+          request.getProtocol(),
+          response.getStatus()
       );
     }
   }