Add two missing ocamlPackages.cohttp-* packages

[Niols]

Description of changes

As of 5.1.0, cohttp contains two packages that are not in nixpkgs, namely cohttp-lwt-jsoo and cohttp-top. This PR adds the two packages in question. Three notes:

1. This PR builds on top of ocamlPackages.cohttp*: 5.0.0 -> 5.1.0 #226657. Changes to pkgs/development/ocaml-modules/cohttp/default.nix should therefore be discussed there instead. I did this to avoid a situation where (a) we test bumping the version on one hand and (b) we test adding the two packages on the other hand, but we don't (c) test adding the two packages with the bumped version, where (a) and (b) would be fine but (c) wouldn't. The two packages in question already exist in version 5.0.0 of cohttp, though, so if my reasoning isn't the best I could also make this PR independent.

2. By inheriting metadata from cohttp and cohttp-lwt, I am effectively making you, @vbgl, maintainer of these two new packages. I thought it was odd for me to put myself as maintainer of these two when you were already handling the rest, but this solution is also a bit odd. WDYT?

3. The current master branch of cohttp includes yet another set of new packages that will probably land in cohttp 6.0.0, namely:

   • cohttp-bench
   • cohttp-curl
   • cohttp-curl-async
   • cohttp-curl-lwt
   • cohttp-eio
   • cohttp-server-lwt-unix
   • http

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/)
• 23.05 Release Notes (or backporting 22.11 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
• Fits CONTRIBUTING.md.

[Alizter]

Result of nixpkgs-review pr 226662 run on x86_64-linux 1

4 packages built:

• comby
• dune-release
• ligo
• liquidsoap

[ulrikstrid]

If you rebase on master we should be able to merge this

[Niols]

Done. Both packages build fine for me on x86_64-linux, x86_64-darwin and aarch64-darwin.