Remove Sonar Integration (#4135)

Sonar has been removed from the build workflow. This PR removes all
configuration and code markings that were used to facilitate it.

Signed-off-by: Danno Ferrin <danno.ferrin@gmail.com>

util/src/main/java/org/hyperledger/besu/util/Slf4jLambdaHelper.java

@@ -25,7 +25,6 @@ import org.slf4j.Logger;
  */
 public class Slf4jLambdaHelper {
 
-  // sonar code smell
   private Slf4jLambdaHelper() {}
 
   public static void warnLambda(