[Bug] Optimized FileSegmentManagedBuffer.nioByteBuffer to avoid multiple read file

[xumanbu]

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Describe the bug

FileSegmentManagedBuffer#nioByteBuffer read file directly without cache at now. ShuffleDataResult getData() may read file twice when buffer instanceof FileSegmentManagedBuffer, it‘s not Consistent with NettyManagedBuffer.

   if (buffer.nioByteBuffer().hasArray()) {
      return buffer.nioByteBuffer().array();
    }

expect: FileSegmentManagedBuffer#nioByteBuffer should add a buffer to hold read file result to avoid multiple read file

Affects Version(s)

master

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