treewide: use mkPackageOption

This commit replaces a lot of usages of `mkOption` with the package
type, to be `mkPackageOption`, in order to reduce the amount of code.

nixos/modules/services/monitoring/prometheus/default.nix

@@ -1564,14 +1564,7 @@ in
 
     enable = mkEnableOption (lib.mdDoc "Prometheus monitoring daemon");
 
-    package = mkOption {
-      type = types.package;
-      default = pkgs.prometheus;
-      defaultText = literalExpression "pkgs.prometheus";
-      description = lib.mdDoc ''
-        The prometheus package that should be used.
-      '';
-    };
+    package = mkPackageOption pkgs "prometheus" { };
 
     port = mkOption {
       type = types.port;