Increase timeout in DataStreamLifecycleDownsampleDisruptionIT (#122151)

The downsample task sometimes needs a little bit longer to complete so
we bump the timeout from 60s to 120s.

Fixes #122056

Author: nielsbauman

muted-tests.yml

@@ -379,9 +379,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/121537
 - class: org.elasticsearch.xpack.migrate.action.ReindexDatastreamIndexTransportActionIT
   issue: https://github.com/elastic/elasticsearch/issues/121737
-- class: org.elasticsearch.xpack.downsample.DataStreamLifecycleDownsampleDisruptionIT
-  method: testDataStreamLifecycleDownsampleRollingRestart
-  issue: https://github.com/elastic/elasticsearch/issues/122056
 - class: org.elasticsearch.xpack.restart.FullClusterRestartIT
   method: testWatcherWithApiKey {cluster=UPGRADED}
   issue: https://github.com/elastic/elasticsearch/issues/122061

x-pack/plugin/downsample/src/internalClusterTest/java/org/elasticsearch/xpack/downsample/DataStreamLifecycleDownsampleDisruptionIT.java

@@ -119,7 +119,7 @@ public void testDataStreamLifecycleDownsampleRollingRestart() throws Exception {
             } catch (Exception e) {
                 throw new AssertionError(e);
             }
-        }, 60, TimeUnit.SECONDS);
+        }, 120, TimeUnit.SECONDS);
         ensureGreen(targetIndex);
     }
 }