FreeBSD CI suspended on git/git and gitgitgadget/git

[Johannes Schindelin <Johannes.Schindelin@xxxxxx>]

Team,

I noticed that there is a problem with the FreeBSD runs on Cirrus CI (see
e.g. https://cirrus-ci.com/task/6611218006278144):

  Not enough compute credits to prioritize tasks!
  Failed to start an instance: INVALID_ARGUMENT: Not Found 404 Not Found
  POST https://compute.googleapis.com:443/compute/v1/projects/cirrus-ci-community/zones/us-central1-c/instances
  {
    "error":
    {
      "code": 404,
      "message": "The resource 'projects/freebsd-org-cloud-dev/global/images/family/freebsd-12-3' was not found",
      "errors": [
        {
          "message": "The resource 'projects/freebsd-org-cloud-dev/global/images/family/freebsd-12-3' was not found",
          "domain": "global",
          "reason": "notFound"
        }
      ]
    }
  }

This makes all the FreeBSD CI builds fail immediately. Sadly, I do not
have time to investigate further, so I suspended the Cirrus CI
installations on https://github.com/git/git and
https://github.com/gitgitgadget/git.

Ciao,
Johannes