haskellPackages.gi-adwaita: mark as broken

See #164686. As Stackage LTS still restricts the gi-gtk packages to GTK 3
compatible releases, looking into this doesn't make too much sense yet.
(Also nothing actually depends on it at the moment.)

pkgs/development/haskell-modules/configuration-hackage2nix/broken.yaml

@@ -1688,6 +1688,7 @@ broken-packages:
   - ghc-usage
   - gh-labeler
   - giak
+  - gi-adwaita
   - gi-cogl
   - Gifcurry
   - gi-gio-hs-list-model

pkgs/development/haskell-modules/configuration-hackage2nix/main.yaml

@@ -68,8 +68,7 @@ core-packages:
 # tracked in stackage.yaml. Adding conflicting overrides with stackage here will
 # not work.
 default-package-overrides:
-  # gi-gdkx11-4.x requires gtk-4.x, which is still under development and
-  # not yet available in Nixpkgs
+  # gi-gdkx11-4.x requires gtk-4.x, but stackage still restricts gi-gtk to 3.*
   - gi-gdkx11 < 4
   # reflex-dom-pandoc is only used by neuron which needs a version < 1.0.0.0
   - reflex-dom-pandoc < 1.0.0.0