It has no custom methods defined, only adds `frostfs error: `
prefix to the error message. The utility of this prefix is debatable,
failed invocations already have `invocation failed` prefix.
Change-Id: If25ebb3679497f3f10acde43b596c81d52351907
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
Avoid dependency on `morph/client` package because of `InvokeRes`.
Make signature resemble `WaitAny()` method of `waiter.Waiter` from neo-go.
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>