Re-enable file skipping on timestamp columns based on maxValues stat

[sgrebnov]

Files skipping based on maxValues stat for Timestamps was disabled in PR below as per delta spec add.stats min/max values are truncated to milliseconds (not rounded up) so filter could filter out valid item

• fix: disable timestamp column for data skipping delta-io/delta-kernel-rs#1003

PR re-enables file skipping on timestamp columns by subtracting 999 microseconds from predicate value used for filtering keeping potentially good entries. Note - DataSkippingPredicateEvaluator only performs initial filtering, final filtering is done based on actual data content/metadata so it is valid to relax filter here.

The following approach was reviewed/considered as well: Instead of changing predicate value, generate comparison expression that substracts this value, but
1-Datafusion does not support Timestampt-Int64 (must be interval) and Delta Kernel and Delta spec does not have Interval type so introducing it seems to be unreasinable
2-Adjustment must be only based on knowledge of target operator (Greater vs Less) and if inversion is enabled/disabled so can't be always included into get_max_stat

Next step is to add more test, update logic for minStat (review if logic needs to be adjusted for inverted=false) - I expect it is also affected the same way with inversion

[sgrebnov]

Upstream PR created: delta-io#1333