[Backport] add VirtualColumns.findEquivalent and VirtualColumn.EquivalenceKey#17166

clintropolis merged 1 commit intoapache:31.0.0apache/druid:31.0.0from

clintropolis:backport-17084-to-31.0.0clintropolis/druid:backport-17084-to-31.0.0Copy head branch name to clipboard