WIP: Test c/common errors wrap PR

[saschagrunert]

For testing containers/common#1077

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[Luap99]

I think this requires a similar change here in podman before we can merge the common changes (and likely for other c/common users such as skopeo/buildah). Podman checks with errors.Cause() which does not work with errors created/wrapped with fmt.Errorf()

[saschagrunert]

Ugh, this is going to take a while. I can probably work tomorrow on it :)

[Luap99]

Ugh, this is going to take a while. I can probably work tomorrow on it :)

Sure, I remember looking at this a while ago but I gave up quickly because of the huge amount of changes required.
I think it is easier to start this in podman because this way it should work without the common changes, github.com/pkg/errors errors implement the unwrap interface so errors.Is() will work with them.