Failing test_eviction_on_rss_treshold

https://github.com/dragonflydb/dragonfly/actions/runs/19884092364
https://github.com/dragonflydb/dragonfly/actions/runs/19912988985

```
         if heartbeat_rss_eviction:
            # We should see used memory deacrease and number of some number of evicted keys
>           assert memory_info_after["used_memory"] < memory_info_before["used_memory"]
E           assert 772468480 < 772468480
```