Move per-Arquillian cleanup from before bean discovery to before CDI …

…shutdown, now that the clean-up is in the RegistryFactory stop rather than start method

microprofile/tests/tck/tck-metrics/src/test/java/io/helidon/microprofile/metrics/tck/MetricsTckCdiExtension.java

@@ -19,12 +19,16 @@
 
 import jakarta.enterprise.event.Observes;
 import jakarta.enterprise.inject.spi.BeforeBeanDiscovery;
+import jakarta.enterprise.inject.spi.BeforeShutdown;
 import jakarta.enterprise.inject.spi.Extension;
 
 public class MetricsTckCdiExtension implements Extension {
 
     void before(@Observes BeforeBeanDiscovery discovery) {
-        RegistryFactory.getInstance().start();
         discovery.addAnnotatedType(ArrayParamConverterProvider.class, ArrayParamConverterProvider.class.getSimpleName());
     }
+
+    void after(@Observes BeforeShutdown shutdown) {
+        RegistryFactory.getInstance().stop();
+    }
 }