Fix workflows deprecated warnings

[HeinrichAD]

Currently the workflow actions throw 90 deprecated warnings during the testing phase. This PR should fix them.

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• The set-output command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
• Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: actions/checkout@v2, actions/setup-java@v2, actions/upload-artifact@v2, actions/download-artifact@v2. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

[HeinrichAD]

I'm no GitHub workflow expert. But I followed the suggested changes (see links). Maybe somebody with more experiences in workflows can review the changes?

[arnaudroques]

I'm no GitHub workflow expert. But I followed the suggested changes (see links). Maybe somebody with more experiences in workflows can review the changes?

We are not neither :-)

Let's see the result. And don't worry, in case of major issue, we still could eventually rollback.

But I am confident it will work :-)