Build for kitinerary-bin broken because centos 7 is eol

[kesselb]

Summary

Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
...
Cannot find a valid baseurl for repo: base/7/x86_64

Failing workflow: https://github.com/nextcloud-libraries/kitinerary-bin/actions/runs/13696844532/job/38301112201

Notes:

• https://invent.kde.org/vkrause/kitinerary-static-build
• Use an older glibc for compatibility

[vkrause]

This is solved in the upstream workflow (https://invent.kde.org/pim/kitinerary/) since quite some time, the workflow here probably should be updated to match that.

The workaround there to keep using CentOS 7 is however just a band-aid, ultimately this needs a switch to something newer. That's not hard as such (on the contrary, it will likely simplify things), the limiting factor is the minimum required glibc version, and that's something for Nextcloud to decide.

Orthogonal to that it might be worth exploring if this can be folded into upstream and become integrated into the release process there, avoiding this entire duplication. I have no idea what that would entail regarding the PHP packaging side though.