stratisd: 3.8.2 -> 3.8.6

[ElvishJerricco]

If #457894 is merged before this, this needs to be retargeted to master.

Ideally the code just wouldn't trigger what appears to be new warnings as of the latest rust update, but it's silly that upstream enables errors on warnings, so deleting that seems like the best option.

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

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[NickCao]

Does v3.8.6 fix any of these warnings?

[ElvishJerricco]

@NickCao Yea, I guess it does. I still think it's silly that they have warnings as errors enabled outside of CI, but I've changed the PR to just update the package, and I've run the stratis and installer-systemd-stage-1.stratis NixOS tests.