[SPARK-35141][SQL] Support two level of hash maps for final hash aggregation#32242

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c21 wants to merge 5 commits intoapache:masterfrom

Commits on Apr 19, 2021

Support two level hash map for final hash aggregation
c21
committed

Commits on Apr 20, 2021

Add limit early stop, listener to clean up resource, and fix doc
c21
committed

Commits on Apr 21, 2021

Move fast hash map cleanup logic to HashAggregateExec
c21
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Commits on Apr 22, 2021