ci, refactor: Use Ubuntu release date tags instead of release names #23503

A few ci jobs use release names (hiruste) while others use date tag. This pull request aligns Ubuntu image date release tags in ci/test/*.sh

The digest are the same:

docker image inspect ubuntu:focal ubuntu:20.04 | jq -r  '.[].RepoDigests[0]'
ubuntu@sha256:626ffe58f6e7566e00254b638eb7e0f3b11d4da9675088f4781a50ae288f3322
ubuntu@sha256:626ffe58f6e7566e00254b638eb7e0f3b11d4da9675088f4781a50ae288f3322

docker image inspect ubuntu:hirsute ubuntu:21.04 | jq -r  '.[].RepoDigests[0]'
ubuntu@sha256:26cd4ff32a9c031eaca3d6f589a7799f28b34a539e1bd81acbf1a6efeec4b1ce
ubuntu@sha256:26cd4ff32a9c031eaca3d6f589a7799f28b34a539e1bd81acbf1a6efeec4b1ce

I did not change the image names in .cirrus.yml, only in ci/test/*.sh

I'd do not touch CI task names as they already are long enough and not readable in the GitHub web-interface:

I'd do not touch CI task names as they already are long enough and not readable in the GitHub web-interface:

True, but are readable here What about changing the ubuntu image names to all dates, i.e. align the .cirrus.yaml with ci/test/*.sh?

wait for #23504

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #23504 (ci: Replace soon EOL hirsute with jammy by MarcoFalke)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.