[high-bucket] FTS rebalance out in high bucket density test takes really long hours (28hrs+)

Rebalance exited with reason {service_rebalance_failed,fts,

{worker_died,

{'EXIT',<0.13606.525>,

{{linked_process_died,<27016.24380.381>,

{timeout,

{gen_server,call,

[<27016.22501.381>,

{call,"ServiceAPI.GetCurrentTopology",

#Fun<json_rpc_connection.0.102434519>},

60000]}}},

{gen_server,call,

[{'service_agent-fts','ns_1@172.23.97.15'},

{if_rebalance,<0.19462.525>,

{start_rebalance,

<<"f81721335b42662e837612d6b366cca3">>,

rebalance,

[{[{node_id,

<<"827b0f5298e3447fa469c0ebdcad3da0">>},

{priority,0},

{opaque,null}],

full}],

[[{node_id,

<<"592321897f0f721188d778a77f4c9d9b">>},

{priority,0},

{opaque,null}]],

<0.13606.525>}},

90000]}}}}}.

Rebalance Operation Id = f5116259df628e7619516c5b6cba1997