add lettuce db client metrics

Author: zeitlinger

instrumentation/lettuce/lettuce-5.1/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/lettuce/v5_1/TracingHolder.java

@@ -5,7 +5,6 @@
 
 package io.opentelemetry.javaagent.instrumentation.lettuce.v5_1;
 
-
 import io.lettuce.core.tracing.Tracing;
 import io.opentelemetry.api.GlobalOpenTelemetry;
 import io.opentelemetry.instrumentation.lettuce.v5_1.LettuceTelemetry;