Create a row partitioner

[xweichu]

Create a row partitioner which partitions the Arrow based on rows. Make each subpartition close to 10MB.

[xweichu]

Here is an example of the partitioner:
https://github.com/uccross/skyhookdm-pythonclient/blob/master/client/skyhookdmclient/skyhook.py#L77 , the partitioner function should be extracted.