[Merge] ~alexmurray/ubuntu-seeds:promote-nftables-lp1887187 into ~ubuntu-core-dev/ubuntu-seeds/+git/platform:jammy

[Alex Murray]

Thanks for the feedback @vorlon and @xnon - I have just pushed an additional chance to depend on nftables and have (iptables) as recommends, let's embrace the future :)
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https://code.launchpad.net/~alexmurray/ubuntu-seeds/+git/ubuntu-seeds/+merge/417621
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