Is your feature request related to a problem?
This is a follow up to #3550, which introduce a new configuration of bucketNullable.

That PR implements bucketNullable=false by adding a IS_NOT_NULL FILTER in logical plan. However this new filter operator is redundant since we already has hint(BUCKET_NULLABLE=false) in LogicalAggregate to implies null bucket is not included, and it will also prevent aggregate push down in some cases.

What solution would you like?
Add that filter in planning process by hint strategy instead of directly add it in logical plan.

What alternatives have you considered?
A clear and concise description of any alternative solutions or features you've considered.

Do you have any additional context?
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