[ML2/OVS] Use nftables instead of legacy iptables#2214

jovial wants to merge 12 commits intostackhpc/2025.1stackhpc/stackhpc-kayobe-config:stackhpc/2025.1from

bufix/2025.1/nftablesstackhpc/stackhpc-kayobe-config:bufix/2025.1/nftablesCopy head branch name to clipboard