ocamlPackages.{ipaddr,macaddr}: 3.1.0 → 5.0.0 and update all affected packages...

ocamlPackages.{ipaddr,macaddr}: 3.1.0 → 5.0.0 and update all affected packages (tuntap, conduit, cohttp, …) (#91350)

* ocamlPackages.{ipaddr,macaddr}: 3.1.0 → 5.0.0
* ipaddr-cstruct: new package (since 4.0.0)
* ipaddr-sexp: new package (since 4.0.0)
* macaddr-cstruct: new package (since 4.0.0)
* macaddr-sexp: new package (since 4.0.0)
* macaddr: enable tests (don't depend on ipaddr anymore)
* ocamlPackages.tuntap: 1.3.0 → 2.0.0
* ocamlPackages.conduit{,-lwt,-lwt-unix}: 1.4.0 → 2.2.2
* ocamlPackages.cohttp{,-lwt,-lwt-unix}: 2.1.3 → 2.5.1
* ocamlPackages: use dune 2 if pkg (indirectly) depends on cohttp-lwt-unix

dune refuses to build a package if one of its dependencies uses dune 2.