MINOR: Fix LogCleanerManagerTest.testLogsUnderCleanupIneligibleForCompaction() for LogMessageTimestampType = "LogAppendTime" (apache#12333)

While setting Defaults.LogMessageTimestampType to "LogAppendTime", `LogCleanerManagerTest.testLogsUnderCleanupIneligibleForCompaction()` fails with a InvalidTimestampException.

This PR fixes this by regenerating the records instead of previous approach of re-using same records in the test.

Reviewers: Divij Vaidya <[email protected]>, Kvicii <[email protected]>

---------

Co-authored-by: fangxiaobing <[email protected]>

Author: fxbing

core/src/test/scala/unit/kafka/log/LogCleanerManagerTest.scala

@@ -358,7 +358,7 @@ class LogCleanerManagerTest extends Logging {
 
     log.appendAsLeader(records, leaderEpoch = 0)
     log.roll()
-    log.appendAsLeader(records, leaderEpoch = 0)
+    log.appendAsLeader(TestUtils.singletonRecords("test2".getBytes, key="test2".getBytes), leaderEpoch = 0)
     log.updateHighWatermark(2L)
 
     // simulate cleanup thread working on the log partition