Convert Jetty 8.0 groovy to java (#7975)

related to
#7195

Author: heyams

instrumentation/jetty/jetty-8.0/javaagent/build.gradle.kts

@@ -29,3 +29,11 @@ dependencies {
   latestDepTestLibrary("org.eclipse.jetty:jetty-server:10.+") // see jetty-11.0 module
   latestDepTestLibrary("org.eclipse.jetty:jetty-servlet:10.+") // see jetty-11.0 module
 }
+
+// jetty-server 10+ requires Java 11
+val latestDepTest = findProperty("testLatestDeps") as Boolean
+if (latestDepTest) {
+  otelJava {
+    minJavaVersionSupported.set(JavaVersion.VERSION_11)
+  }
+}

instrumentation/jetty/jetty-8.0/javaagent/src/test/groovy/JettyHandlerTest.groovy

@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+package io.opentelemetry.javaagent.instrumentation.jetty.v8_0;
+
 import io.opentelemetry.api.GlobalOpenTelemetry;
 import io.opentelemetry.api.trace.Tracer;
 import java.util.concurrent.Callable;

instrumentation/jetty/jetty-8.0/javaagent/src/test/groovy/QueuedThreadPoolTest.groovy

@@ -3,6 +3,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+package io.opentelemetry.javaagent.instrumentation.jetty.v8_0;
+
 public class JavaLambdaMaker {
 
   @SuppressWarnings("FunctionalExpressionCanBeFolded")