fedora-ostree-pruner: drop hardcoding of test mode; limit to compose repo

[dustymabe]

commit 5690b6bc17e1decfd30d0061217b62400e049fae
Author: Dusty Mabe <dusty@dustymabe.com>
Date:   Wed Dec 14 10:16:39 2022 -0500

    fedora-ostree-pruner: drop hardcoding of test mode; limit to compose repo
    
    We're in a position right now where we need to recover some space but
    Kevin Fenzi is out on a much deserved break. Let's make this script
    start taking real action by unsetting `args.test = True`, but let's
    be conservative and only operate on the compose repo for now until
    Kevin gets back.
    
    In the most recent test this got us 1.2T in space back:
    
    ```
    Total objects: 10768149
    Would delete: 7437430 objects, freeing 1.2 TB
    ```

commit 575b0b1af63bb25f50d21418d30787043ce87208
Author: Dusty Mabe <dusty@dustymabe.com>
Date:   Wed Dec 14 10:14:53 2022 -0500

    fedora-ostree-pruner: add ppc64le and s390x fedora-coreos arches
    
    We now have s390x and will soon have ppc64le in the prod repo for
    Fedora CoreOS.

[jlebon]

Before we do this for real, it'd be good to have people sanity-check the refs that would be pruned. And maybe we announce it in e.g. #fedora-releng ?

[dustymabe]

Before we do this for real, it'd be good to have people sanity-check the refs that would be pruned. And maybe we announce it in e.g. #fedora-releng ?

Yeah. I'll coordinate with Kevin Fenzi on it.