Unmute elastic#126348 (elastic#126690)

This was already fixed by elastic#126501.

Fixes elastic#126348

Author: nielsbauman

muted-tests.yml

@@ -378,9 +378,6 @@ tests:
 - class: org.elasticsearch.search.SearchWithRejectionsIT
   method: testOpenContextsAfterRejections
   issue: https://github.com/elastic/elasticsearch/issues/126340
-- class: org.elasticsearch.xpack.ilm.ClusterStateWaitThresholdBreachTests
-  method: testWaitInShrunkShardsAllocatedExceedsThreshold
-  issue: https://github.com/elastic/elasticsearch/issues/126348
 - class: org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
   method: test {p0=search.vectors/42_knn_search_bbq_flat/Vector rescoring has same scoring as exact search for kNN section}
   issue: https://github.com/elastic/elasticsearch/issues/126368