Nixpkgs 23.11 update

[johnalotoski]

Overview

Bumps nixpkgs to 23.11 release and nix to 2.19.3, adding required module config changes, lint updates and tofu utilization.

Details

• Bumps nixpkgs -> 23.11,
• Bumps nixpkgs-unstable -> HEAD
• Bumps nix -> 2.19.3
• Adds required nixpkgs 23.11 chronyd and postgres DB module option changes
• Adds localFlake pinning for jq and nushellFull pkgs for the case the downstream repo is using nixpkgs <= 23.05
• Adds a nixosConfiguration warning if cardano-parts nixpkgs version differs from downstream repo nixpkgs version
• Refactors nixosModule code for updated nixpkgs 23.11 nix linter pkg requirements
• Updates the template flake to default to following cardano-parts for nixpkgs, nixpkgs-unstable and flake-parts pins
• Migrates from terraform to opentofu to maintain open source license usage
  • The prior just tf and just terraform recipes remain as aliases to just tofu
  • The terraform binary no longer exists in the devShell and has been replaced by tofu binary