test: load aa-profiles with compatible ABIs for the host

[MoisesGSalas]

AppArmor uses the Policy feature ABI to establish which rules it can enforced based on the kernel capabilities.

In Ubuntu 20.04 and 22.04 the /etc/apparmor/parser.conf defined a fallback pined policy (policy-features=/etc/apparmor.d/abi/2.13 and policy-features=/etc/apparmor.d/abi/kernel-5.4-outoftree-network, respectively). On Ubuntu 24.04 the fallback ABIs are not pinned and thus the networking rules are not enforced. We add the 3.0 ABI to the profile meant to be used on Ubuntu>=22.04.

Notes:

From what I understand the release of Ubuntu 22.04 was a little bit a ahead of the AppArmor 3 release so they needed a patched Kernel and a different ABI (https://git.launchpad.net/ubuntu/+source/apparmor/tree/debian/patches/ubuntu/enable-pinning-of-pre-AppArmor-3.x-poli.patch?h=ubuntu/jammy). Current versions of Ubuntu already ship the 3.0 ABI and the kernel with upstream support for the networking rules so we can simply use that one.

This comment was really helpful in understanding the problem: netblue30/firejail#3659 (comment)

[openedx-webhooks]

Thanks for the pull request, @MoisesGSalas!

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[MoisesGSalas]

Hi @feanil, I think I already found how to fix the tests on 24.04.

Btw, should I always be tagging you for review, are you the only one?

[feanil]

I think right now it's just you and me that knows this stuff well. I think we should also bump the version and update the readme to make it clear which version of the profile to use on which versions of ubuntu, can you add that to this PR and then I think it's good to merge and release.

[feanil]

One small suggestion but then this looks good to land and release. Be sure to mention that this adds Ubuntu 24.04 support as a part of the release notes.