Make GeoIpDownload work for default project explicitly (#123845)

GeoIpDownloaderTaskExecutor needs to be made project aware eventually.
In the meantime, to unblock tests, this PR makes the stopping action
work explicitly for the default project only.

Author: ywangd

modules/ingest-geoip/src/main/java/org/elasticsearch/ingest/geoip/GeoIpDownloaderTaskExecutor.java

@@ -398,7 +398,7 @@ private void stopTask(Runnable onFailure) {
             ActionListener.runAfter(listener, () -> {
                 IndexAbstraction databasesAbstraction = clusterService.state()
                     .metadata()
-                    .getProject()
+                    .getDefaultProject()
                     .getIndicesLookup()
                     .get(DATABASES_INDEX);
                 if (databasesAbstraction != null) {