Mute testAutomaticReleaseOfIndexBlock

Relates #45338

Author: dimitris-athanasiou

server/src/test/java/org/elasticsearch/cluster/routing/allocation/decider/MockDiskUsagesIT.java

@@ -143,6 +143,7 @@ public void testRerouteOccursOnDiskPassingHighWatermark() throws Exception {
         });
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/45338")
     public void testAutomaticReleaseOfIndexBlock() throws Exception {
         List<String> nodes = internalCluster().startNodes(3);