Support storage policy builder for objects in CLI

[cthulhu-rider]

in CLI we have

$ neofs-cli container nodes -h
Show nodes taking part in a container at the current epoch.

technically, nothing stops us from providing analogue for object placement

$ neofs-cli object nodes -h
Show nodes to store the object according to the storage policy.

this feature may help user (incl. developer) to see how the data should be located IRL. For example, analyse placement changes/compatibility on real networks

it may be also useful for tools like in nspcc-dev/neofs-testcases#599

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i'd also provide option to request and show realtime location (afaik we don't provide tool for this now)

[roman-khimov]

How come #2530 hadn't closed it?

[carpawell]

How come #2530 hadn't closed it?

Does not have any close funny words. It was really closed by #2530.