Column validation: Implement support for INTERVAL columns

[nj1973]

Column validations of Interval columns are skipped:

07/21/2025 03:26:13 PM-INFO: Skipping sum on col_interval_ds due to data type: interval
07/21/2025 03:26:13 PM-INFO: Skipping sum on col_interval_ym due to data type: interval
07/21/2025 03:26:13 PM-INFO: Skipping min on col_interval_ds due to data type: interval
07/21/2025 03:26:13 PM-INFO: Skipping min on col_interval_ym due to data type: interval

For this issue we need to look into which aggregations we can support and what they should look like.

Tests test_column_validation_intervals should test supported agg types as they are implemented.

See #1214 for the Row validation counterpart to this issue.