25.8.16 Backports of #88440, #95301 - Fix sparse columns aggregation for any overflow mode#1396

zvonand merged 4 commits intoreleases/25.8.16Altinity/ClickHouse:releases/25.8.16from

backports/25.8.16/95301Altinity/ClickHouse:backports/25.8.16/95301Copy head branch name to clipboard