[ML Data Frame] Mute stop start test

Relates to https://github.com/elastic/elasticsearch/issues/42650

x-pack/plugin/src/test/resources/rest-api-spec/test/data_frame/transforms_start_stop.yml

@@ -90,6 +90,9 @@ teardown:
   - match: { airline-data-by-airline-start-stop.mappings: {} }
 ---
 "Test start/stop/start transform":
+  - skip:
+      reason: "https://github.com/elastic/elasticsearch/issues/42650"
+      version: "all"
   - do:
       data_frame.start_data_frame_transform:
         transform_id: "airline-transform-start-stop"