cargo-tauri.hook: use finalPackage as cargo-tauri

[TomaSajt]

This PR simplifies usage of cargo-tauri.hook when cargo-tauri is overridden

This PR should not cause any rebuilds.

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The related question that still remains is how to package cargo_tauri_2 and how a cargo-tauri_2 vs cargo-tauri_1 split will work inside pkgs/by-name

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/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 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.

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[getchoo]

Thanks! I hadn't thought of something like this before

The related question that still remains is how to package cargo_tauri_2 and how a cargo-tauri_2 vs cargo-tauri_1 split will work inside pkgs/by-name

That's being done in #346277, which this will be a major help in (and should now be merged after this)

[TomaSajt]

Okay, I just put meta into the overrideAttrs, hopefully that's OK.

[getchoo]

Sorry for the wait. Moving meta and passthru to the overrideAttrs arguments is fine with me. Thanks!

[TomaSajt]

Closing in favor of #354999