rico2: move alertmanager and grafana here

hosts/rico1/services/apps/default.nix

@@ -4,9 +4,7 @@ let
 in
 {
   imports = [
-    ./alertmanager.nix
     ./blocky.nix
-    ./grafana.nix
     ./prometheus.nix
     ./loki
     ../../../shared/prometheus-exporters.nix

hosts/rico2/services/apps/default.nix

@@ -1,5 +1,7 @@
 _: {
   imports = [
+    ./alertmanager.nix
+    ./grafana.nix
     ../../../shared/prometheus-exporters.nix
     ../../../shared/promtail.nix
   ];