[Merge] ~enr0n/ubuntu/+source/systemd:ubuntu-focal-sru into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-focal

[Nick Rosbrook]

It looks like the test beds for focal do not support link alternative names, so I will just drop the tests that rely on that.
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https://code.launchpad.net/~enr0n/ubuntu/+source/systemd/+git/systemd/+merge/437809
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