nixosTests.docker-rootless: migrate to runTestOn

Part of #386873

nixos/tests/all-tests.nix

···
   dnsdist = import ./dnsdist.nix { inherit pkgs runTest; };
   doas = runTest ./doas.nix;
   docker = runTestOn [ "aarch64-linux" "x86_64-linux" ] ./docker.nix;
-  docker-rootless = handleTestOn [ "aarch64-linux" "x86_64-linux" ] ./docker-rootless.nix { };
+  docker-rootless = runTestOn [ "aarch64-linux" "x86_64-linux" ] ./docker-rootless.nix;
   docker-registry = handleTest ./docker-registry.nix { };
   docker-tools = handleTestOn [ "x86_64-linux" ] ./docker-tools.nix { };
   docker-tools-nix-shell = runTest ./docker-tools-nix-shell.nix;

nixos/tests/docker-rootless.nix

···
 # This test runs docker and checks if simple container starts
+{ lib, pkgs, ... }:
+{
+  name = "docker-rootless";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ abbradar ];
+  };
 
-import ./make-test-python.nix (
-  { lib, pkgs, ... }:
-  {
-    name = "docker-rootless";
-    meta = with pkgs.lib.maintainers; {
-      maintainers = [ abbradar ];
-    };
+  nodes = {
+    machine =
+      { pkgs, ... }:
+      {
+        virtualisation.docker.rootless.enable = true;
 
-    nodes = {
-      machine =
-        { pkgs, ... }:
-        {
-          virtualisation.docker.rootless.enable = true;
-
-          users.users.alice = {
-            uid = 1000;
-            isNormalUser = true;
-          };
+        users.users.alice = {
+          uid = 1000;
+          isNormalUser = true;
         };
-    };
+      };
+  };
 
-    testScript =
-      { nodes, ... }:
-      let
-        user = nodes.machine.config.users.users.alice;
-        sudo = lib.concatStringsSep " " [
-          "XDG_RUNTIME_DIR=/run/user/${toString user.uid}"
-          "DOCKER_HOST=unix:///run/user/${toString user.uid}/docker.sock"
-          "sudo"
-          "--preserve-env=XDG_RUNTIME_DIR,DOCKER_HOST"
-          "-u"
-          "alice"
-        ];
-      in
-      ''
-        machine.wait_for_unit("multi-user.target")
+  testScript =
+    { nodes, ... }:
+    let
+      user = nodes.machine.config.users.users.alice;
+      sudo = lib.concatStringsSep " " [
+        "XDG_RUNTIME_DIR=/run/user/${toString user.uid}"
+        "DOCKER_HOST=unix:///run/user/${toString user.uid}/docker.sock"
+        "sudo"
+        "--preserve-env=XDG_RUNTIME_DIR,DOCKER_HOST"
+        "-u"
+        "alice"
+      ];
+    in
+    ''
+      machine.wait_for_unit("multi-user.target")
 
-        machine.succeed("loginctl enable-linger alice")
-        machine.wait_until_succeeds("${sudo} systemctl --user is-active docker.service")
+      machine.succeed("loginctl enable-linger alice")
+      machine.wait_until_succeeds("${sudo} systemctl --user is-active docker.service")
 
-        machine.succeed("tar cv --files-from /dev/null | ${sudo} docker import - scratchimg")
-        machine.succeed(
-            "${sudo} docker run -d --name=sleeping -v /nix/store:/nix/store -v /run/current-system/sw/bin:/bin scratchimg /bin/sleep 10"
-        )
-        machine.succeed("${sudo} docker ps | grep sleeping")
-        machine.succeed("${sudo} docker stop sleeping")
-      '';
-  }
-)
+      machine.succeed("tar cv --files-from /dev/null | ${sudo} docker import - scratchimg")
+      machine.succeed(
+          "${sudo} docker run -d --name=sleeping -v /nix/store:/nix/store -v /run/current-system/sw/bin:/bin scratchimg /bin/sleep 10"
+      )
+      machine.succeed("${sudo} docker ps | grep sleeping")
+      machine.succeed("${sudo} docker stop sleeping")
+    '';
+}