Mute org.elasticsearch.cluster.ClusterStateSerializationTests testSerializationPreMultiProject #130872

muted-tests.yml

@@ -558,6 +558,9 @@ tests:
 - class: org.elasticsearch.xpack.slm.SLMFileSettingsIT
   method: testSettingsApplied
   issue: https://github.com/elastic/elasticsearch/issues/130853
+- class: org.elasticsearch.cluster.ClusterStateSerializationTests
+  method: testSerializationPreMultiProject
+  issue: https://github.com/elastic/elasticsearch/issues/130872
 
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