sherlock: use X-Restart-Triggers instead of onChange

[74k1]

As suggested in #7678 (comment)

As rycee already mentioned, this will make sd-switch handle the restart.

I also added myself as a maintainer to this module. If this is unwanted, please let me know.

Checklist

• Change is backwards compatible.

• Code formatted with nix fmt or
  nix-shell -p treefmt nixfmt deadnix keep-sorted --run treefmt.

• Code tested through nix run .#tests -- test-all or
  nix-shell --pure tests -A run.all.

• Test cases updated/added. See example.

• Commit messages are formatted like

  {component}: {description}
  
  {long description}
  

  See CONTRIBUTING for more information and recent commit messages for examples.

• If this PR adds a new module

  • Added myself as module maintainer. See example.
  • Generate a news entry. See News
  • Basic tests added. See Tests

• If this PR adds an exciting new feature or contains a breaking change.

  • Generate a news entry. See News

[74k1]

I suppose the tests failed because I'm not in all-maintainers.nix yet. Is there anything I can do about this?

[khaneliman]

Looks like it needs a nix fmt