[24.05] electron_30-bin: mark as insecure because it's EOL, electron-source.electron_30: remove as it's EOL

[teutat3s]

Depends on electron version bumps / backports to 24.05 for:

• antares: @hatch01 ([24.05] antares: 0.7.28 -> 0.7.29, modernize; remove electron override #353884)
• bilibili: @Jedsek @kashw2 @Bot-wxt1221
• deltachat-desktop: @dotlambda (Upstream is still on Electron 30 until release of 1.47.0+)
• lx-music-desktop: @oosquare (Upstream is still on Electron 30)
• morgen: @muscaln @justanotherariel ([Backport release-24.05] morgen: bump electron version to electron_32 #353871)
• teams-for-linux: ([Backport release-24.05] teams-for-linux: 1.9.5 -> 1.11.2; electron 30 -> 32 #351714)
• webcord: @huantianad ([Backport release-24.05] webcord: 4.9.2 -> 4.10.2 #353891)
• webcord-vencord: ([Backport release-24.05] webcord-vencord: switch to electron_31 #351674)

Things done

Manual backport of #350549

• 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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[Bot-wxt1221]

Nothing against me. Bilibili should be kept on electron-30 because it can't work in higher version. Anyway, bilibili is unfree software and won't influence hydra.