ci(criu): add CRIU PPA for Podman dependency (backport #770)

[mergify]

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See cryostatio/cryostat-core#494

Description of the change:

This change allows an environment variable to be configured so that...

Motivation for the change:

This change is helpful because users may want to...

How to manually test:

1. Run CRYOSTAT_IMAGE=quay.io... bash smoketest.bash...
2. ...

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This is an automatic backport of pull request #770 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 19ffc04 has failed:

On branch mergify/bp/cryostat-v3.0/pr-770
Your branch is up to date with 'origin/cryostat-v3.0'.

You are currently cherry-picking commit 19ffc04.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .github/workflows/pr-ci.yaml
	both modified:   .github/workflows/push-ci.yaml

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally