Mute org.elasticsearch.xpack.ml.integration.MlJobIT testOpenJob_GivenTimeout_Returns408 elastic#119810

Author: elasticsearchmachine

muted-tests.yml

@@ -463,3 +463,6 @@ tests:
 - class: org.elasticsearch.xpack.ml.integration.MlJobIT
   method: testUsage
   issue: https://github.com/elastic/elasticsearch/issues/119659
+- class: org.elasticsearch.xpack.ml.integration.MlJobIT
+  method: testOpenJob_GivenTimeout_Returns408
+  issue: https://github.com/elastic/elasticsearch/issues/119810