DNM Add compressed version of all collected logs

[danpawlik]

In the post job, there would be create a tar.gz. file that contains all collected logs.
It might be helpful to download whole logs in faster way than iterating on each files.

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• Appropriate testing is done and actually running

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[softwarefactory-project-zuul]

Build failed (check pipeline). Post recheck (without leading slash)
to rerun all jobs. Make sure the failure cause has been resolved before
you rerun jobs.

https://softwarefactory-project.io/zuul/t/rdoproject.org/buildset/1d92a26281b449b285121283f526008c

❌ openstack-k8s-operators-content-provider POST_FAILURE in 1h 29m 23s
❌ podified-multinode-edpm-deployment-crc POST_FAILURE in 1h 14m 10s
❌ cifmw-crc-podified-edpm-baremetal POST_FAILURE in 1h 13m 03s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 22s
✔️ cifmw-pod-pre-commit SUCCESS in 8m 14s