Per https://groups.google.com/a/redhat.com/g/konflux-announce/c/eTo6yXmg0XY/m/DPsWUGqCAgAJ we should change manager's name from rpm to rpm-lockfile.

This should be done before 29 September - 3 October, otherwise MintMaker will not like it (how exactly - whether it'll stop renovating - is unknown).

We need to do it across three main repos.

We don't have to backport to release branches because Renovate does not read config there but I'd still do backporting.