Add a test for forcing compression and v2s2 format

[Jamstah]

This highlights a bug in common where the compression format is reset if the format is v2s2, even if its a valid compression format.

Does this PR introduce a user-facing change?

None

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Jamstah
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[Luap99]

cc @mtrmac

[packit-as-a-service]

Cockpit tests failed for commit 6871b47. @martinpitt, @jelly, @mvollmer please check.

[packit-as-a-service]

Cockpit tests failed for commit 5563a32. @martinpitt, @jelly, @mvollmer please check.

[martinpitt]

Wrt. failed cockpit rawhide test: I reported the criu/kernel regression to https://bugzilla.redhat.com/show_bug.cgi?id=2328985 and silenced it in our tests in cockpit-project/bots#7146 . From now on, this failure will be ignored, i.e. tests should go back to green. Please either retry or re-push.

[mtrmac]

Thanks! ACK to the goal and overall approach.

[mtrmac]

For the record, this PR exists to test containers/common#2255 .

[packit-as-a-service]

Ephemeral COPR build failed. @containers/packit-build please check.