`LongWindowOptimized` pass should select the best pre-aggr table if there are multiple

[zhanghaohit]

Bug Description Currently the LongWindowOptimized pass just select the first one pre-aggr table and use it.

Expected Behavior Two possible solutions:

• only create one pre-aggr table if all the meta is same expect the bucket size
• select the best pre-aggr if there are multiple pre-aggr tables exists for the same meta