community/cloud-init: upgrade to 21.4
Upgrade to cloud-init 21.4. Remove 02-hosts-template-fix.patch which was accepted upstream. Rename some existing patches. Add 06-ssh-fp-debug.patch.
Upgrade to cloud-init 21.4. Remove 02-hosts-template-fix.patch which was accepted upstream. Rename some existing patches. Add 06-ssh-fp-debug.patch.