[TEST] Mute ReadOnlyEngineTests.testForceMergeOnReadOnlyEngine (#67234)

Relates #67232

server/src/test/java/org/elasticsearch/index/engine/ReadOnlyEngineTests.java

@@ -189,6 +189,7 @@ public class ReadOnlyEngineTests extends EngineTestCase {
         }
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/67232")
     public void testForceMergeOnReadOnlyEngine() throws IOException {
         IOUtils.close(engine, store);
         final AtomicLong globalCheckpoint = new AtomicLong(SequenceNumbers.NO_OPS_PERFORMED);