Always evaluate with config.allowAliases = false to avoid deprecation warning errors

[roberth]

Since #250, we've been checking that Nixpkgs doesn't depend on aliases.

In NixOS/nixpkgs#134230 I've had to revert deprecation warnings in order to let ofborg evaluate cleanly.

If we apply allowAliases = false to all evaluations, we will be able to provide helpful deprecation warnings without causing ofborg to fail.

It will also save an evaluation, because the separate check from #250 will be implicit in the other evals.

[SuperSandro2000]

Bump.
This is annoying for nixpkgs-review users because ofborg lists aliases in ^.^! which don't work if you have aliases locally disabled and break the tool.

[Artturin]

i had to nixpkgs-review pr 166605 --eval local
otherwise i got this error

130 artturin@nixos ~ % review 166605
$ git -c fetch.prune=false fetch --no-tags --force https://github.com/NixOS/nixpkgs staging:refs/nixpkgs-review/0 pull/166605/head:refs/nixpkgs-review/1
$ git worktree add /home/artturin/.cache/nixpkgs-review/pr-166605-3/nixpkgs 8459123046dbdb9f03145310c5e36ce6195a7151
Preparing worktree (detached HEAD 8459123046d)
Updating files: 100% (30114/30114), done.
HEAD is now at 8459123046d Merge pull request #166715 from siraben/social-auth-eval-fix
$ git merge --no-commit --no-ff 4f2f6cb71e171016cea0f86f4ed6f36976fb4406
Automatic merge went well; stopped before committing as requested
$ nix --experimental-features nix-command build --no-link --keep-going --option build-use-sandbox relaxed -f /home/artturin/.cache/nixpkgs-review/pr-166605-3/build.nix
error: attribute 'python_rsvg' missing

       at /home/artturin/.cache/nixpkgs-review/pr-166605-3/build.nix:3567:9:

         3566|         gnome2."gnome_python"
         3567|         gnome2."python_rsvg"
             |         ^
         3568|         gnome2."gnome_vfs"
(use '--show-trace' to show detailed location information)

created
NixOS/nixpkgs#166790