[CELEBORN-1519] Do not update estimated partition size if it is uncha…

…nged

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

We will not update the estimated partition size if it is unchanged.

### Why are the changes needed?

Celeborn currently triggers an workerinfo update even-though the estimated partition size is not changed. This leads to unnecessary logging and redundant worker info update operations.

Example log -

```
[master-partition-size-updater] WARN org.apache.celeborn.service.deploy.master.clustermeta.AbstractMetaManager - Celeborn cluster estimated partition size changed from 64.0 MiB to 64.0 MiB
```

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

NO

### How was this patch tested?
Existing UT's

Closes apache#2642 from s0nskar/CELEBORN-1519.

Authored-by: Sanskar Modi <[email protected]>
Signed-off-by: Cheng Pan <[email protected]>

master/src/main/java/org/apache/celeborn/service/deploy/master/clustermeta/AbstractMetaManager.java

@@ -472,6 +472,12 @@ public void updatePartitionSize() {
     } else {
       estimatedPartitionSize = initialEstimatedPartitionSize;
     }
+
+    // Do not trigger update is estimated partition size value is unchanged
+    if (estimatedPartitionSize == oldEstimatedPartitionSize) {
+      return;
+    }
+
     LOG.warn(
         "Celeborn cluster estimated partition size changed from {} to {}",
         Utils.bytesToString(oldEstimatedPartitionSize),