Revert "Mute testAddOrRenewRetentionLease (elastic#38240)"

This reverts commit 8bee5b8.

Author: dnhatn

server/src/test/java/org/elasticsearch/index/seqno/ReplicationTrackerRetentionLeaseTests.java

@@ -50,7 +50,6 @@
 
 public class ReplicationTrackerRetentionLeaseTests extends ReplicationTrackerTestCase {
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/pull/38239")
     public void testAddOrRenewRetentionLease() {
         final AllocationId allocationId = AllocationId.newInitializing();
         long primaryTerm = randomLongBetween(1, Long.MAX_VALUE);