Extend license timeout in CcrIntegTestCase (#83247)

The default of 10s is too short for some slower CI workers to apply the
license on all nodes, given how many other things happen while the
cluster is forming. This commit extends the timeout to a more generous
60s.

x-pack/plugin/ccr/src/test/java/org/elasticsearch/xpack/CcrIntegTestCase.java

@@ -187,7 +187,7 @@ public final void startClusters() throws Exception {
         assertBusy(() -> {
             ClusterService clusterService = leaderCluster.getInstance(ClusterService.class);
             assertNotNull(clusterService.state().metadata().custom(LicensesMetadata.TYPE));
-        });
+        }, 60, TimeUnit.SECONDS);
 
         String address = leaderCluster.getDataNodeInstance(TransportService.class).boundAddress().publishAddress().toString();
         InternalTestCluster followerCluster = new InternalTestCluster(
@@ -211,7 +211,7 @@ public final void startClusters() throws Exception {
         assertBusy(() -> {
             ClusterService clusterService = followerCluster.getInstance(ClusterService.class);
             assertNotNull(clusterService.state().metadata().custom(LicensesMetadata.TYPE));
-        });
+        }, 60, TimeUnit.SECONDS);
         setupMasterNodeRequestsValidatorOnFollowerCluster();
     }