makes symlinks for wgpu-native library where odin expects

[benbot]

Odin expects the backing libraries for its vendor packages to exist in specific locations. For wgpu specifically, it defaults to using the static build of wgpu-native.

This PR adds a flag to the odin package which, when enabled, includes the correct version of wgpu-native and symlinks the library files to the locations that odin expected.

I also removed a line in wgpu-native which deleted the static wgpu-native library. It's built along with the shared library anyway. I can put that change behind a flag as well, if needed.

These changes are specifically for linux and scoped as such.

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.

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[benbot]

Oh it's actually a little stickier. odin is checking for a specific version, but the version we build is, of course, different :\

[benbot]

Okay, had to set WGPU_NATIVE_VERSION at build time.