[improve][ci] Move some flaky ExtensibleLoadManager tests to flaky group until they are fixed (#23414)

Author: lhotari

pulsar-broker/src/test/java/org/apache/pulsar/broker/loadbalance/extensions/BrokerRegistryIntegrationTest.java

@@ -37,7 +37,7 @@
 import org.testng.annotations.Test;
 
 @Slf4j
-@Test(groups = "broker")
+@Test(groups = "flaky")
 public class BrokerRegistryIntegrationTest {
 
     private static final String clusterName = "test";

pulsar-broker/src/test/java/org/apache/pulsar/broker/loadbalance/extensions/BrokerRegistryMetadataStoreIntegrationTest.java

@@ -22,7 +22,7 @@
 import org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateMetadataStoreTableViewImpl;
 import org.testng.annotations.Test;
 
-@Test(groups = "broker")
+@Test(groups = "flaky")
 public class BrokerRegistryMetadataStoreIntegrationTest extends BrokerRegistryIntegrationTest {
 
     @Override

pulsar-broker/src/test/java/org/apache/pulsar/broker/loadbalance/extensions/ExtensibleLoadManagerCloseTest.java

@@ -38,7 +38,7 @@
 import org.testng.annotations.Test;
 
 @Slf4j
-@Test(groups = "broker")
+@Test(groups = "flaky")
 public class ExtensibleLoadManagerCloseTest {
 
     private static final String clusterName = "test";