ELN should ideally be ahead of CentOS and RHEL with policy changes, but
due to time constraints was not. Fix that by bringing the current CentOS
9 / RHEL 9 state of SHA-1 disabling to ELN.
Due to differences in their lifecycles, Fedora's packages will stay at
allowing SHA-1 by default for now. There is a plan to gradually catch up
to the ELN state over the next few releases.
Signed-off-by: Clemens Lang <cllang@redhat.com>