Fix CodeNarc PackageName violation in KafkaConfigHelperTest

Move test to default package to avoid underscore in package name,
matching the convention used by other kafka test files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: piochelepiotr

…afka_common/KafkaConfigHelperTest.groovy …test/groovy/KafkaConfigHelperTest.groovydd-java-agent/instrumentation/kafka/kafka-common/src/test/groovy/datadog/trace/instrumentation/kafka_common/KafkaConfigHelperTest.groovy renamed to dd-java-agent/instrumentation/kafka/kafka-common/src/test/groovy/KafkaConfigHelperTest.groovy dd-java-agent/instrumentation/kafka/kafka-common/src/test/groovy/datadog/trace/instrumentation/kafka_common/KafkaConfigHelperTest.groovy renamed to dd-java-agent/instrumentation/kafka/kafka-common/src/test/groovy/KafkaConfigHelperTest.groovy

@@ -1,5 +1,4 @@
-package datadog.trace.instrumentation.kafka_common
-
+import datadog.trace.instrumentation.kafka_common.KafkaConfigHelper
 import spock.lang.Specification
 
 class KafkaConfigHelperTest extends Specification {