vscodium: Add aarch64-darwin support

[sloane-shark]

Description of changes

Add support for aarch64-darwin packages for vscodium, now that they have addressed VSCodium/vscodium#597

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• 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/)
• 22.05 Release Notes (or backporting 21.11 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
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[takeda]

nixpkgs-review said there's nothing to build.

Manually fetching and building appears to produce exact same output as without this patch on x86_64-linux. The binary appears to work (called with --help and --version). Looks good to me.

[turion]

LGTM trusting that you've successfully built it on aarch64-darwin :)

[sloane-shark]

Can confirm I built and tested the binaries on my M1 Macbook Pro :)

[turion]

Thanks!