parasite: Remove double args copy
parasite: Remove double args copy

There's a shared memory between crtools and parasite. No need in copying
args back and forth, just get the args pointer in crtools and work on it.
Where not possible (misc, fds drain) do explicit memecpy (to be fixed).

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

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