Rename next_security_versions method
What does this MR do and why?
Renames Versions.next_security_versions
to Versions.next_versions
so
it can be freely used outside the security release context. This is
needed as part of the maintenance policy extension, where bug fixes will
be allowed to be backported to the last three releases.
Related to https://gitlab.com/gitlab-org/release-tools/-/issues/532
Author Check-list
- [-] Has documentation been updated?
Edited by Mayra Cabrera