[Fleet] add "traces" type to data stream list (#87985)

Update the index pattern uysed for populating
the list of data streams to include traces-*-*.

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

x-pack/plugins/fleet/server/routes/data_streams/handlers.ts

@@ -9,7 +9,7 @@ import { GetDataStreamsResponse, KibanaAssetType, KibanaSavedObjectType } from '
 import { getPackageSavedObjects, getKibanaSavedObject } from '../../services/epm/packages/get';
 import { defaultIngestErrorHandler } from '../../errors';
 
-const DATA_STREAM_INDEX_PATTERN = 'logs-*-*,metrics-*-*';
+const DATA_STREAM_INDEX_PATTERN = 'logs-*-*,metrics-*-*,traces-*-*';
 
 export const getListHandler: RequestHandler = async (context, request, response) => {
   const callCluster = context.core.elasticsearch.legacy.client.callAsCurrentUser;