test_network_disconnect_during_migration assertion error

[kostasrim]

https://github.com/dragonflydb/dragonfly/actions/runs/12071045927/job/33661894970#step:6:4820

Unrelated to my changes:

ubprocess.TimeoutExpired: Command '['/__w/dragonfly/dragonfly/build/dragonfly', '--proactor_threads=4', '--cluster_mode=yes', '--serialization_max_chunk_size=0', '--port=30001', '--admin_port=31001', '--dbfilename=', '--noversion_check', '--maxmemory=8G', '--vmodule=dragonfly_connection=1,accept_server=1,listener_interface=1,main_service=1,rdb_save=1,replica=1,cluster_family=1,proactor_pool=1,dflycmd=1', '--jsonpathv2', '--list_experimental_v2', '--log_dir=/tmp/dragonfly_logs/test_network_disconnect_during_migration_df_seeder_factory0-df_factory0_', '--num_shards=3']' timed out after 120 seconds�[0m

Because serialization_max_chunk_size=0