Add Kafka Connect stable semconv test task

Author: trask

instrumentation/kafka/kafka-connect-2.6/testing/build.gradle.kts

@@ -37,3 +37,16 @@ tasks.withType<Test>().configureEach {
   systemProperty("io.opentelemetry.smoketest.agent.shadowJar.path", agentShadowJar.get().archiveFile.get().toString())
   systemProperty("collectMetadata", findProperty("collectMetadata"))
 }
+
+tasks {
+  val testStableSemconv by registering(Test::class) {
+    testClassesDirs = sourceSets.test.get().output.classesDirs
+    classpath = sourceSets.test.get().runtimeClasspath
+    jvmArgs("-Dotel.semconv-stability.opt-in=database")
+    systemProperty("metadataConfig", "otel.semconv-stability.opt-in=database")
+  }
+
+  check {
+    dependsOn(testStableSemconv)
+  }
+}