Github actions v3 will be discontinued

[mknaranja]

I today received:

Artifact actions v3 will be closing down by January 30, 2025. You are receiving this email because you have GitHub Actions workflows using v3 of actions/upload-artifact or actions/download-artifact. After this date using v3 of these actions will result in a workflow failure. Artifacts within their retention period will remain accessible from the UI or REST API regardless of the version used to upload.

We should therefore just see to replace it. Who could take this over? @jubicker or @HenrZu ?

[HenrZu]

There was already some work in #1149 towards this issue. I will look into this.

[reneSchm]

I have already replaced all occurrences of upload/download-artifact@v3 in that PR, my guess is that the mail is outdated/referring to an older branch. So we may just have to merge main into some branches,