We need it for structs to be usable as function parameters, otherwise
they're not implementing stackitam.Convertible and they fail at transaction
script creation phase:
2025/01/22 20:31:26 bootstrap error: could not invoke method (addNode): test invocation failed: unsupported operation: *netmap.NetmapNode2 type
Related to https://github.com/nspcc-dev/neofs-node/pull/3088.
Signed-off-by: Roman Khimov <roman@nspcc.ru>