remote: handle partial data transmission

remote: handle partial data transmission

A new bug was introduced as a part of use-after-free fix below:

    commit 411cbe7199ce533ae5fa78f5558dddca6f88ef1a
    Author: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
    Date:   Tue Jul 4 13:10:22 2023 +0600

        remote: fix stream use-after-free

When the message was processed partially, it is actually supposed to
stay in the queue to be processed again. In such case, reinsert it back.

Signed-off-by: Oleg Vasilev <oleg.vasilev@virtuozzo.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>