[SPARK-43087][SQL] Support coalesce buckets in join in AQE #40731
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What changes were proposed in this pull request?
This PR adds
CoalesceBucketsInJointoAdaptiveSparkPlanExec.queryStagePreparationRules.Why are the changes needed?
Coalesce buckets in join will not work if AQE is enabled.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Unit test.