Changes

OBS: build_binpkg: adjust for new almalinux repo

We are enabling CentOS 8 compatible repositories again for very few
packages. The URL for the package feed is now AlmaLinux_8 instead of
CentOS_8, because AlmaLinux 8 is not EOL yet and seems to work best with
OBS of the CentOS 8 compatible distros.

Related: SYS#8110
Change-Id: I3e9f44f200cdbe28fa4cd21f54b81d73fa543075