nixosTests.starship: migrate to runTest

Part of #386873

nixos/tests/all-tests.nix

···
   sssd-ldap = handleTestOn [ "x86_64-linux" "aarch64-linux" ] ./sssd-ldap.nix { };
   stalwart-mail = handleTest ./stalwart-mail.nix { };
   stargazer = runTest ./web-servers/stargazer.nix;
-  starship = handleTest ./starship.nix { };
+  starship = runTest ./starship.nix;
   stash = handleTestOn [ "x86_64-linux" "aarch64-linux" ] ./stash.nix { };
   static-web-server = handleTest ./web-servers/static-web-server.nix { };
   step-ca = handleTestOn [ "x86_64-linux" ] ./step-ca.nix { };

nixos/tests/starship.nix

···
-import ./make-test-python.nix (
-  { pkgs, ... }:
-  {
-    name = "starship";
-    meta.maintainers = pkgs.starship.meta.maintainers;
+{ pkgs, ... }:
+{
+  name = "starship";
+  meta.maintainers = pkgs.starship.meta.maintainers;
 
-    nodes.machine = {
-      programs = {
-        fish.enable = true;
-        zsh.enable = true;
+  nodes.machine = {
+    programs = {
+      fish.enable = true;
+      zsh.enable = true;
 
-        starship = {
-          enable = true;
-          settings.format = "<starship>";
-        };
+      starship = {
+        enable = true;
+        settings.format = "<starship>";
       };
+    };
 
-      environment.systemPackages =
-        map
-          (
-            shell:
-            pkgs.writeScriptBin "expect-${shell}" ''
-              #!${pkgs.expect}/bin/expect -f
+    environment.systemPackages =
+      map
+        (
+          shell:
+          pkgs.writeScriptBin "expect-${shell}" ''
+            #!${pkgs.expect}/bin/expect -f
 
-              spawn env TERM=xterm ${shell} -i
+            spawn env TERM=xterm ${shell} -i
 
-              expect "<starship>" {
-                send "exit\n"
-              } timeout {
-                send_user "\n${shell} failed to display Starship\n"
-                exit 1
-              }
+            expect "<starship>" {
+              send "exit\n"
+            } timeout {
+              send_user "\n${shell} failed to display Starship\n"
+              exit 1
+            }
 
-              expect eof
-            ''
-          )
-          [
-            "bash"
-            "fish"
-            "zsh"
-          ];
-    };
+            expect eof
+          ''
+        )
+        [
+          "bash"
+          "fish"
+          "zsh"
+        ];
+  };
 
-    testScript = ''
-      start_all()
-      machine.wait_for_unit("default.target")
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("default.target")
 
-      machine.succeed("expect-bash")
-      machine.succeed("expect-fish")
-      machine.succeed("expect-zsh")
-    '';
-  }
-)
+    machine.succeed("expect-bash")
+    machine.succeed("expect-fish")
+    machine.succeed("expect-zsh")
+  '';
+}