Revert "apparmor: fix and improve the service"

This reverts commit fb6d63f3fd.

I really hope this finally fixes #99236: evaluation on Hydra.
This time I really did check basically the same commit on Hydra:
https://hydra.nixos.org/eval/1618011

Right now I don't have energy to find what exactly is wrong in the
commit, and it doesn't seem important in comparison to nixos-unstable
channel being stuck on a commit over one week old.

nixos/modules/virtualisation/lxc.nix

@@ -74,13 +74,9 @@ in
     systemd.tmpfiles.rules = [ "d /var/lib/lxc/rootfs 0755 root root -" ];
 
     security.apparmor.packages = [ pkgs.lxc ];
-    security.apparmor.policies = {
-      "bin.lxc-start".profile = ''
-        include ${pkgs.lxc}/etc/apparmor.d/usr.bin.lxc-start
-      '';
-      "lxc-containers".profile = ''
-        include ${pkgs.lxc}/etc/apparmor.d/lxc-containers
-      '';
-    };
+    security.apparmor.profiles = [
+      "${pkgs.lxc}/etc/apparmor.d/lxc-containers"
+      "${pkgs.lxc}/etc/apparmor.d/usr.bin.lxc-start"
+    ];
   };
 }

nixos/modules/virtualisation/lxd.nix

@@ -93,15 +93,11 @@ in
 
     security.apparmor = {
       enable = true;
+      profiles = [
+        "${cfg.lxcPackage}/etc/apparmor.d/usr.bin.lxc-start"
+        "${cfg.lxcPackage}/etc/apparmor.d/lxc-containers"
+      ];
       packages = [ cfg.lxcPackage ];
-      policies = {
-        "bin.lxc-start".profile = ''
-          include ${cfg.lxcPackage}/etc/apparmor.d/usr.bin.lxc-start
-        '';
-        "lxc-containers".profile = ''
-          include ${cfg.lxcPackage}/etc/apparmor.d/lxc-containers
-        '';
-      };
     };
 
     systemd.services.lxd = {