chore(3p/sources): bump channels & overlays (2024-10-12)

* amend keycloak configuration as per upgrade guide for their latest, most
  innovative breaking changes.

  https://www.keycloak.org/docs/latest/upgrading/index.html#deprecated-proxy-option
* users/aspen: remove deprecated noXlibs option. This option has no alternative.

Change-Id: I49f45e38cda6b01ddf6f014b7b1c43972b76629f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12601
Tested-by: BuildkiteCI
Reviewed-by: aspen <root@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

users/aspen/system/system/iso.nix

@@ -11,10 +11,6 @@ let
     networking.useDHCP = false;
     networking.firewall.enable = false;
     networking.wireless.enable = lib.mkForce false;
-
-    # TODO(aspen): enabling this (in the minimal profile) fails the iso build,
-    # since gtk+3 needs to be built which fails due to cairo without xlibs
-    environment.noXlibs = false;
   };
 in
 (depot.third_party.nixos {