Unmute RemoteClusterSecurityReloadCredentialsRestIT testFirstTimeSetupWithElasticsearchSettings (#116530)

Author: gwbrown

muted-tests.yml

@@ -290,9 +290,6 @@ tests:
 - class: org.elasticsearch.ingest.geoip.EnterpriseGeoIpDownloaderIT
   method: testEnterpriseDownloaderTask
   issue: https://github.com/elastic/elasticsearch/issues/115163
-- class: org.elasticsearch.xpack.remotecluster.RemoteClusterSecurityReloadCredentialsRestIT
-  method: testFirstTimeSetupWithElasticsearchSettings
-  issue: https://github.com/elastic/elasticsearch/issues/116286
 - class: org.elasticsearch.xpack.security.operator.OperatorPrivilegesIT
   method: testEveryActionIsEitherOperatorOnlyOrNonOperator
   issue: https://github.com/elastic/elasticsearch/issues/102992