Benchmarks for group by spilling to disk #7571

Is your feature request related to a problem or challenge?

@kazuyukitanimura added the group by spill feature in #7400 -- it would be great to

@sunchao #7400 (review) noted it would be nice to have benchmarks that cover the spilling code (current benchmarks only cover the case when there is no spilling and the grouping remains in memory):

Describe the solution you'd like

Suggestion from @sunchao #7400 (review):

It would be very nice if we can do some tests like in this PR: duckdb/duckdb#7931, which measures how performance may degrade as memory budget becomes lower.

Describe alternatives you've considered

No response

Additional context

No response