test: initial repro test by codex

[Samyak2]

running 1 test
test joins::hash_join::exec::tests::build_side_final_aggregate_respects_grouped_memory_limit ... FAILED

failures:

---- joins::hash_join::exec::tests::build_side_final_aggregate_respects_grouped_memory_limit stdout ----
Error: Shared(ResourcesExhausted("Additional allocation failed for HashJoinInput with top memory consumers (across reservations) as:\n  HashJoinInput#3(can spill: false) consumed 3.0 GB, peak 3.0 GB,\n  GroupedHashAggregateStream[0] (count_value)#2(can spill: true) consumed 28.1 MB, peak 104.1 MB.\nError: Failed to allocate additional 24.0 MB for HashJoinInput with 3.0 GB already allocated for this reservation - 21.8 MB remain available for the total memory pool: greedy(used: 3.0 GB, pool_size: 3.0 GB)"))


failures:
    joins::hash_join::exec::tests::build_side_final_aggregate_respects_grouped_memory_limit

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 1449 filtered out; finished in 1.40s

peak_mem_used for final aggregate = ~104MB
But hash join fails even with 3GB memory limit!