[Merge] ~toabctl/livecd-rootfs:focal-ssh-pwauth into livecd-rootfs:ubuntu/focal

[Utkarsh Gupta]

Review: Approve

Merged, thanks! Note that I've added an "UNRELEASED" d/ch entry and haven't uploaded yet. I can upload this once the upload to Jammy is done.
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https://code.launchpad.net/~toabctl/livecd-rootfs/+git/livecd-rootfs-1/+merge/459042
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