release-haskell: stop building aarch64 and darwin static haskell packages
release-haskell: stop building aarch64 and darwin static haskell packages

The statically-linked Haskell packages on Darwin are not currently
working because libiconv is not building statically on Darwin.

The statically-linked Haskell packages on aarch64 are timing out on Hydra.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs