Expose min_value/max_value when min/max for row group is empty

Hello,

Would it make sense to expose the min_value/max_value of the statistics of a row group when min/max (deprecated fields) are not set?

See: https://github.com/jorgecarleitao/arrow2/issues/1236 for some more details / test case.

Kind regards,
Martijn

Start by reviewing the linked arrow2 issue 1236 and its test case, then locate Apache Arrow's Parquet row-group statistics handling. Confirm how empty deprecated min/max fields relate to min_value/max_value, and consider the work complete when the newer values are exposed consistently and the referenced case is covered.

Written by the indexing model from the issue text.