Refs #36502 - update snapshots after template change

Fixes #37019 - Correct release names in OS factories

Fixes #36723 - Remove Fedora/Red Hat Atomic related code

As far as I can see this has been EOL for a few years now. Red Hat
Atomic went EOL in 2021.

Fixes #35124 - Fix preseed_kernel_options to work with full-host-bootdisk deployments

Update corresponding template snapshots.

Co-authored-by: Bastian Schmidt <schmidt@atix.de>

Refs #36677 - fix tests

Fixes #36490 - Remove redundant ERB closing tag in coreos template

Refs #36490 - Regenerate template snapshots

Fixes #36189 - Add AlmaLinux UEFI provisioning support

In pxegrub2_chainload.erb various paths are tried, but the
/EFI/almalinux/grubx64.efi path is missing. This causes the server
to refuse to boot.

To make it easier to use the AlmaLinux installation medium is added.

Fixes #36180 - iPXE provisioning template for Ubuntu autoinstall

Fixes #36014 - Kickstart default - remove @core group

The Core group is always selected, it is not necessary to
specify it in the %packages section.

Fixes #35840 - Install chrony on RHEL 7