Update the Fedora version

[Zarquan]

Update the Fedora version used by the Ansible deployment to the latest version, probably FedoraCoreOS33-20210314.

Need to run the acceptance tests on the medium-04, small-08 and tiny-16 deployments before we merge this change.

[Zarquan]

Depends on "Define acceptance tests #474"

[Zarquan]

Following migration to Arcus we now have new versions of Fedora available.

    openstack \
        --os-cloud "${cloudname:?}" \
            image list

    +--------------------------------------+------------------------------+--------+
    | ID                                   | Name                         | Status |
    +--------------------------------------+------------------------------+--------+
    ....
    | 1779f380-780d-40d8-8052-b3acb91ed530 | Fedora-31-1.9                | active |
    | e62a71df-4bd2-4498-9eae-058ff476b5ad | Fedora-33-1.2                | active |
    | e5c23082-cc34-4213-ad31-ff4684657691 | Fedora-34.1.2                | active |
    | dcb41a5f-868a-4880-9fd5-04b95ab97c47 | FedoraAtomic29-20191126      | active |
    | a079781f-80b7-4d89-95ae-ef65bfb0834f | FedoraCoreOS33               | active |
    | 191d3d4d-60cc-4b87-b4a7-0a03cc48a51e | FedoraCoreOS34               | active |
    ....
    +--------------------------------------+------------------------------+--------+

[Zarquan]

We can't update the version of Fedora until we solve the issues with Python 3.8 #637.

[Zarquan]

Worth seeing if we import our own images for Fedora Cloud and CoreOS.

• https://getfedora.org/en/coreos
• https://alt.fedoraproject.org/en/cloud/

We can ask for approved versions once we have them working.

[Zarquan]

Also worth trying a version of Rocky as well.

[akrause2014]

Rocky 8.6 (+ Python 3.8) tested on EIDF Openstack.

[Zarquan]

We have our own image for Fedora 38, gaia-dmp-fedora-cloud-38-1.6, installed on all three colours.