Use AutoCloseable instead of JUnit closeable resource

Author: acogoluegnes

src/test/java/com/rabbitmq/stream/perf/TestUtils.java

@@ -352,8 +352,7 @@ private static Field field(Class<?> cls, String name) {
       return field;
     }
 
-    private static class ExecutorServiceCloseableResourceWrapper
-        implements ExtensionContext.Store.CloseableResource {
+    private static class ExecutorServiceCloseableResourceWrapper implements AutoCloseable {
 
       private final ExecutorService executorService;