[7.17] systemtest: wait for geoIP database availability (backport #7272)

[mergify]

This is an automatic backport of pull request #7272 done by Mergify.
Cherry-pick of ec38207 has failed:

On branch mergify/bp/7.17/pr-7272
Your branch is up to date with 'origin/7.17'.

You are currently cherry-picking commit ec38207e.
  (fix conflicts and run "git cherry-pick --continue")
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Unmerged paths:
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	both modified:   systemtest/containers.go

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/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[mergify]

This pull request has not been merged yet. Could you please review and merge it @axw? 🙏

[axw]

/test