unmute test (elastic#122592)

Unmute a test

Author: drempapis

muted-tests.yml

@@ -196,9 +196,6 @@ tests:
 - class: org.elasticsearch.xpack.restart.CoreFullClusterRestartIT
   method: testSnapshotRestore {cluster=UPGRADED}
   issue: https://github.com/elastic/elasticsearch/issues/111799
-- class: org.elasticsearch.backwards.MixedClusterClientYamlTestSuiteIT
-  method: test {p0=search/380_sort_segments_on_timestamp/Test that index segments are NOT sorted on timestamp field when @timestamp field is dynamically added}
-  issue: https://github.com/elastic/elasticsearch/issues/116221
 - class: org.elasticsearch.ingest.geoip.EnterpriseGeoIpDownloaderIT
   method: testEnterpriseDownloaderTask
   issue: https://github.com/elastic/elasticsearch/issues/115163