[Flaky Test] Throw an io.netty.util.IllegalReferenceCountException

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)

### Search before asking

- [X] I have searched in the [issues](https://github.com/apache/incubator-uniffle/issues?q=is%3Aissue) and found no similar issues.

### Describe the flaky test

Caused by: io.netty.util.IllegalReferenceCountException: refCnt: 0
at io.netty.buffer.AbstractByteBuf.ensureAccessible(AbstractByteBuf.java:1454)
at io.netty.buffer.AbstractByteBuf.checkIndex(AbstractByteBuf.java:1383)
at io.netty.buffer.PooledByteBuf.duplicateInternalNioBuffer(PooledByteBuf.java:196)
at io.netty.buffer.PooledByteBuf.nioBuffer(PooledByteBuf.java:213)
at io.netty.buffer.AbstractByteBuf.nioBuffer(AbstractByteBuf.java:1231)
at org.apache.uniffle.common.netty.buffer.NettyManagedBuffer.nioByteBuffer(NettyManagedBuffer.java:48)
at org.apache.uniffle.common.ShuffleIndexResult.getIndexData(ShuffleIndexResult.java:84)

### Actions URL

https://github.com/apache/incubator-uniffle/actions/runs/12158115239/attempts/1

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

Start with the linked GitHub Actions run and the stack trace, then inspect NettyManagedBuffer.java and ShuffleIndexResult.java at the reported calls. Reproduce the flaky test and trace why the buffer has refCnt: 0; done means the failure is addressed and the relevant test passes reliably.

Written by the indexing model from the issue text.