Test for incomplete operation status. #1194
Description
Is your feature request related to a problem? Please describe.
I'm always frustrated when we get things like nspcc-dev/neofs-node#3678 in production.
Describe the solution you'd like
Add special tests for operations that can return "incomplete" status, that is PUT/DELETE/SEARCH. The easiest way to achieve that would be to have "REP 4" container with four nodes and one of them being down. Depending on timeout configurations there might be a period when some "context cancelled" error would be returned, but eventually we should get Incomplete status.