Tracker for Fedora 43 changes to notify users

[marmijo]

This issue will track all the Fedora 43 changes that are worth surfacing in our Fedora 43 communications due to e.g. upgrade considerations.

[dustymabe]

• Removed iptables-legacy and migrated alternatives:
  • overlay.d & tests: Add alternatives migration and test and remove iptables-legacy fedora-coreos-config#3253
  • Migrate existing systems to iptables-nft and remove iptables-legacy #1818
  • updates alternatives don't work  #677

[dustymabe]

• Just in case we don't undo this:
  • Remove qcom dtbs on aarch64 again fedora-coreos-config#3663

[dustymabe]

• https://fedoraproject.org/wiki/Changes/CoreOSStopPublishingOSTree
  • Stop publishing OSTree content for updates #1895

[travier]

• Bootloader (GRUB) and shim are now updated by default:
  • Enable automatic bootloader updates #1468

[dustymabe]

• https://fedoraproject.org/wiki/Changes/BuildFCOSUsingContainerfile
  • Build FCOS based on Fedora 43 using podman build #1969

[dustymabe]

Communication sent out for F43 beta:

• https://lists.fedoraproject.org/archives/list/coreos@lists.fedoraproject.org/message/GK4RMQ3UFMLJGKMBUVTTWGNFVFNNSH5E/
• https://discussion.fedoraproject.org/t/fedora-coreos-next-stream-rebasing-to-fedora-linux-43/164462

[travier]

F43 landed in stable so I think we can close this one now.