awsume: install correct Zsh autocompletion

[antoineco]

Fixes #364985

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

Completion now works out of the box:

$ awsume #<Tab>
default             production     staging             internal

$ cat /nix/store/140zmknj3in2vp47cbcjp95irdpfpzhj-awsume-4.5.5/share/zsh/site-functions/_awsume
#compdef awsume
_arguments "*: :($(/nix/store/140zmknj3in2vp47cbcjp95irdpfpzhj-awsume-4.5.5/bin/awsume-autocomplete))"

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[antoineco]

I think it would be valuable to backport this to nixos-24.11 and nixos-24.05 since both are affected.

[antoineco]

@surfaceflinger apologies for the direct mention; since you reviewed #364972 I figured you might be in a good position to look into this.

[surfaceflinger]

This works and I can tab-complete profile names!

[antoineco]

Ofborg is stuck so the PR is unlikely to get noticed. Closing.