DO NOT MERGE: Run tests with Zstd:chunked compression default

[mtrmac]

Inspired by https://github.com/containers/podman/pull/20633 ; now that #21571 is succeeding, let’s see what happens in the more complex case.

Does this PR introduce a user-facing change?

do not merge this

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mtrmac

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~OWNERS~~ [mtrmac]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[rhatdan]

WhooHoo Passed tests.

[github-actions[bot]]

A friendly reminder that this PR had no activity for 30 days.

[mtrmac]

• [x] Note to self: If/after https://github.com/containers/storage/pull/2156 merges, this PR will need to re-enable enable_partial_images.

[packit-as-a-service[bot]]

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

[mtrmac]

We now (e.g. with https://github.com/containers/podman/pull/25007 ) always run at least some tests with Zstd, and there are no immediate plans to switch to it as default.