No review requests on modules & tests

[Martin Weinelt]

Tested all four combinations of changes to tests/modules with person/teams set as meta.maintainers, and never got a request to review. This is quite a serious defect in our reviewing system.

NixOS/nixpkgs#128447

[Andreas Rammhold]

We can get a list of maintainers for files/modules via:

nix-instantiate --eval '<nixpkgs/nixos>' --arg configuration '{}' -A config.meta.maintainers --strict --json

(cc @infinisil)

[Ryan Lahfa]

Attempt in #641