Unmute EnrichIT#testAvgDurationByArtist (#123443)

Relates #123093

Author: dnhatn

muted-tests.yml

@@ -313,9 +313,6 @@ tests:
 - class: org.elasticsearch.repositories.gcs.GoogleCloudStorageServiceTests
   method: testClientsAreNotSharedAcrossRepositories
   issue: https://github.com/elastic/elasticsearch/issues/123090
-- class: org.elasticsearch.xpack.esql.action.EnrichIT
-  method: testAvgDurationByArtist
-  issue: https://github.com/elastic/elasticsearch/issues/123093
 - class: org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT
   method: test {yaml=reference/troubleshooting/common-issues/disk-usage-exceeded/line_65}
   issue: https://github.com/elastic/elasticsearch/issues/123094