tasks: Move to Fedora 41

[martinpitt]

• fix https://bugzilla.redhat.com/show_bug.cgi?id=2326535 in Fedora 41
• cockpit-ci: Update container to 2024-12-08 cockpit#21410
• build
• test locally with toolbox: starter-kit and cockpit image-prepare and single test:

[martinpitt]

Awesome! I can reproduce this locally:

podman run -it --rm fedora:41 sh -exc 'dnf -y update; dnf -y install "dnf-command(builddep)"; curl -o /tmp/cockpit.spec -s https://raw.githubusercontent.com/cockpit-project/cockpit/main/tools/cockpit.spec; dnf -y builddep --setopt=install_weak_deps=False /tmp/cockpit.spec; echo done'

This makes it quite far -- running the commands interactively makes the segfault appear much earlier and clearer.

This is very likely the same issue as https://bugzilla.redhat.com/show_bug.cgi?id=2326535 , which already got an upstream fix. So let's wait on that.

[martinpitt]

https://bodhi.fedoraproject.org/updates/FEDORA-2024-ea5c34b3b8 landed. But let's block this on cockpit-project/cockpit#21410 to split the major difference in half at least.