planner: resolve panic when the update lists contain complex subquery (#53108) #53269
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This is an automated cherry-pick of #53108
What problem does this PR solve?
Issue Number: close #52687
Problem Summary:
What changed and how does it work?
When we meet the subqueries, we'll rewrite the structure of the plan tree. We need to find a way to represent the subqueries in the UPDATE's lists
Check List
Tests
Side effects
Documentation
Release note
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