adoptopenjdk-{13,14}: mark insecure

[roberth]

Motivation for this change

These JDKs are end-of-life, so shouldn't be used.
15 is also at or close to eol, but I haven't marked that one. It'd be nice if we could provide 16 first.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[roberth]

I also noticed that the adoptopenjdk attributes are functions instead of packages. Is this for a reason? It seems nicer for users to be able to just use these as packages without having to call them first.

nix-repl> adoptopenjdk-bin-15-packages-linux.jdk-hotspot                     
«lambda @ /home/user/h/nixpkgs/pkgs/development/compilers/adoptopenjdk-bin/jdk-linux-base.nix:3:1»

nix-repl> callPackage adoptopenjdk-bin-15-packages-linux.jdk-hotspot {}
«derivation /nix/store/d8h2zq4lpclcn6c2mqjxq78bqi6hcg83-adoptopenjdk-hotspot-bin-15.0.1.drv»

[taku0]

Works as expected.

[taku0]

Could you make a backporting PR?