Properly return response if SegmentCompletion is aborted (apache#13206)

pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/realtime/SegmentCompletionManager.java

@@ -1000,7 +1000,7 @@ private SegmentCompletionProtocol.Response processConsumedAfterCommitStart(Strin
       // If the winner is coming back again, then we have some more conditions to look at.
       response = abortIfTooLateAndReturnHold(now, instanceId, offset);
       if (response != null) {
-        return null;
+        return response;
       }
       if (instanceId.equals(_winner)) {
         // The winner is coming back to report its offset. Take a decision based on the offset reported, and whether we