[Merge] livecd-rootfs:quick-hack-for-apt-cache into livecd-rootfs:ubuntu/jammy

[Michael Hudson-Doyle]

Review: Approve

Well given that something like this was done manually for the .1 ISOs having the gross hack in livecd-rootfs is clearly an improvement if not actually a good thing. Subiquity is quite a lot smarter about how all this nonsense is handled, fwiw.
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https://code.launchpad.net/~ubuntu-core-dev/livecd-rootfs/+git/livecd-rootfs/+merge/437758
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