[Geo] Reset the checksums in a staggered fashion over the course of the day
We want some way to reverify all the checksums after some time. See discussion in https://gitlab.com/gitlab-org/gitlab-ee/issues/7265#note_100117981
The suggestion is to reset the checksums in a staggered fashion over the course of the day and creating a geo event ResetChecksumEvent
to propagate it to secondary.