CELEBORN-1334 [CIP-12] Support HARD_SPLIT in PushMergedData should not support new version client with old version worker

[AngersZhuuuu]

What changes were proposed in this pull request?

Current version client can't be compatibility with older worker version.

Why are the changes needed?

For backward compatibility.

Does this PR introduce any user-facing change?

No

How was this patch tested?

[AngersZhuuuu]

ping @RexXiong

[jiang13021]

@AngersZhuuuu Maybe we can just modify org/apache/celeborn/client/ShuffleClientImpl:PushMergedDataWrappedCallback

@Override
          public void onSuccess(ByteBuffer response) {
            byte reason = response.get();
......

to

@Override
      public void onSuccess(ByteBuffer response) {
        byte reason = StatusCode.SUCCESS.getValue();
        if (response.remaining() > 0) {
          reason = response.get();
        }
......

[AngersZhuuuu]

@AngersZhuuuu Maybe we can just modify org/apache/celeborn/client/ShuffleClientImpl:PushMergedDataWrappedCallback

@Override
          public void onSuccess(ByteBuffer response) {
            byte reason = response.get();
......

to

@Override
      public void onSuccess(ByteBuffer response) {
        byte reason = StatusCode.SUCCESS.getValue();
        if (response.remaining() > 0) {
          reason = response.get();
        }
......

Since new client version not support older version worker, after discuss, we decided to remove this code. cc @RexXiong

[github-actions]

This PR is stale because it has been open 20 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[github-actions]

This PR is stale because it has been open 20 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[turboFei]

anymore comments for this?

ping @AngersZhuuuu @jiang13021 @RexXiong