[TASK] Move CalcRuleValueListTest to unit tests

[oliverklee]

Also add the missing @covers annotations for the superclasses of the tested class.

Part of #758.

[coveralls]

coverage: 54.283% (+0.6%) from 53.705%
when pulling 01daae8 on task/tests/calcrulevaluelist
into 5c193b9 on main.

[JakeQZ]

Don't know if this was ready for review, since none was requested, but it looks fine, so I've approved it, allowing you to merge it if it was indeed ready. (I don't know what happens if you push further changes - hopefully in that case the PR will revert to a 'review required' status.)

[oliverklee]

Don't know if this was ready for review, since none was requested, but it looks fine, so I've approved it, allowing you to merge it.

Thanks! Yes, that's helpful. (I forgot to request a review in two PRs, and hence it was not visible whether I forgot to request a review or whether to set them to draft status.)