Description
We can unify reuse map data structures in non-AQE and AQE rules (`ReuseExchangeAndSubquery`, `ReuseAdaptiveSubquery`) to a simple `Map[<canonicalized plan>, <plan>]`.
Please find discussion here: https://github.com/apache/spark/pull/28885#discussion_r655073897