skip compat tests

Author: kkrik-es

rest-api-spec/build.gradle

@@ -77,6 +77,7 @@ tasks.named("yamlRestCompatTestTransform").configure ({ task ->
   task.skipTest("index/92_metrics_auto_subobjects/Metrics object indexing", "subobjects auto removed")
   task.skipTest("index/91_metrics_no_subobjects/Metrics object indexing with synthetic source", "_source.mode mapping attribute is no-op since 9.0.0")
   task.skipTest("index/91_metrics_no_subobjects/Root without subobjects with synthetic source", "_source.mode mapping attribute is no-op since 9.0.0")
+  task.skipTest("indices.create/20_synthetic_source/subobjects auto", "subobjects auto removed")
   task.skipTest("indices.create/20_synthetic_source/synthetic_source with copy_to inside nested object", "temporary until backported")
   task.skipTest("indices.create/20_synthetic_source/synthetic_source with copy_to pointing to ambiguous field and subobjects auto", "subobjects auto removed")
   task.skipTest("indices.put_index_template/15_composition/Composable index templates that include subobjects: auto on arbitrary field", "subobjects auto removed")