SUSE-RU-2023:2566-1 Security update for SUSE Manager Server 4.3

This update fixes the following issues: branch-network-formula: - Update to version 0.1.1680167239.23f2fec Remove unnecessary import of 'salt.ext.six' cobbler: - Fix cobbler buildiso so that the artifact can be booted by EFI firmware. bsc1206060 - Switch packaging from patch based to Git tree bas...