Nixpkgs upgrade to NixOS 24.11 (backport #11566)

[mergify]

Motivation

In preparation to NixOS 24.11 this updates nixpkgs to unstable until we can switch to the branch off branch. As a side effect this should also help with #11546
So far only the x86_64-linux build has been tested.

Context

Priorities and Process

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This is an automatic backport of pull request #11566 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 2512619 has failed:

On branch mergify/bp/2.24-maintenance/pr-11566
Your branch is ahead of 'origin/2.24-maintenance' by 6 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 2512619cb.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	deleted by us:   doc/manual/package.nix

no changes added to commit (use "git add" and/or "git commit -a")

Cherry-pick of 20ee83f has failed:

On branch mergify/bp/2.24-maintenance/pr-11566
Your branch is ahead of 'origin/2.24-maintenance' by 7 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit 20ee83fff.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   tests/nixos/default.nix

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[edolstra]

I feel that for maintenance branches we should be very conservative to avoid accidental breakage, and upgrading the major Nixpkgs version is not conservative - it tends to break things. So unless there is some critical security issue that isn't fixed on 24.05, I would prefer not to do this.

[szlend]

Note issue #12246, NixOS/nixpkgs#373692 (comment) before attempting updates to nixos-24.11