[#378][FOLLOWUP] fix(server): Fix huge_partition_num metric (#1669)

### What changes were proposed in this pull request?

Fix the metric huge_partition_num.

### Why are the changes needed?

A follow-up PR for: #494.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Existing UTs.

server/src/main/java/org/apache/uniffle/server/ShuffleTaskManager.java

@@ -774,7 +774,7 @@ public void removeResources(String appId, boolean checkAppExpired) {
       storageManager.removeResources(new AppPurgeEvent(appId, shuffleTaskInfo.getUser()));
       if (shuffleTaskInfo.hasHugePartition()) {
         ShuffleServerMetrics.gaugeAppWithHugePartitionNum.dec();
-        ShuffleServerMetrics.gaugeHugePartitionNum.dec(shuffleTaskInfo.getHugePartitionSize());
+        ShuffleServerMetrics.gaugeHugePartitionNum.dec();
       }
       LOG.info(
           "Finish remove resource for appId["