Replace magic-nix-cache-action

[Hasnep]

Headscale is open to code contributions for bug fixes without discussion.

Hopefully this counts as a bug fix 😅 If not, I'm happy to close the PR and discuss the change :)

The DeterminateSystems/magic-nix-cache-action action has been deprecated and no longer works. This PR replaces it with the nix-community/cache-nix-action action, which is actively maintained. It also replaces the DeterminateSystems/nix-installer-action action with the nixbuild/nix-quick-install-action action, which is required for the cache action to work. The cache has been configured to restore based on the runner's OS and architecture, so it should work on any runner.

• [x] have read the CONTRIBUTING.md file
• [ ] raised a GitHub issue or discussed it on the projects chat beforehand
• [ ] added unit tests
• [ ] added integration tests
• [ ] updated documentation if needed
• [ ] updated CHANGELOG.md

[ghost]

Pull Request Revisions

Revision	Description
r1	GitHub Actions Nix Actions Updated Replaced DeterminateSystems Nix actions with alternative nixbuild and nix-community actions, added caching configuration with primary key and restore prefix.

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[kradalby]

I think you missed the update nix workflow, can you have a look at that?

[kradalby]

I think you missed the update nix workflow, can you have a look at that?

We should do a follow up here. Merged because jobs broke on my drafts prs.