Extend in-operator optimziation ORDER BY support

What does this MR do and why?

This MR extends the in-operator optimization to allow sorting by calculated SQL expressions. The change is needed by the #345589 (closed) issue, where we need to sort items by the following expression (duration):

EXTRACT(EPOCH FROM analytics_cycle_analytics_issue_stage_events.end_event_timestamp - analytics_cycle_analytics_issue_stage_events.start_event_timestamp)

The MR includes documentation with a usage example.

The change is not user-facing, the new queries for #345589 (closed) will be implemented in a separate MR.

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