[SPARK-21103][SQL] QueryPlanConstraints should be part of LogicalPlan #18310
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What changes were proposed in this pull request?
QueryPlanConstraints should be part of LogicalPlan, rather than QueryPlan, since the constraint framework is only used for query plan rewriting and not for physical planning.
How was this patch tested?
Should be covered by existing tests, since it is a simple refactoring.