Reapply "Run desktop_login test on updates"

This reverts commit 0b58c35eb6.
Now we worked around the other lock screen bug, this should be OK.

needles/kde/getting_started-kde-f42-20250724.json

@@ -0,0 +1,23 @@
+{
+  "area": [
+    {
+      "xpos": 471,
+      "height": 59,
+      "type": "match",
+      "width": 79,
+      "ypos": 314
+    },
+    {
+      "xpos": 211,
+      "type": "match",
+      "width": 15,
+      "ypos": 633,
+      "height": 16
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "DESKTOP-kde",
+    "getting_started"
+  ]
+}

templates-updates.fif.json

@@ -319,6 +319,11 @@
                 "fedora-updates-workstation-x86_64-*-64bit": 5
             }
         },
+        "desktop_login": {
+            "profile_groups": {
+                "updates-desktops": 5
+            }
+        },
         "desktop_printing": {
             "profile_groups": {
                 "updates-desktops": 5

tests/desktop_login.pm

@@ -352,8 +352,9 @@ sub run {
         # we kept open should be there
         check_user_logged_in(user => "jack", termopen => 1);
     }
-    # Power off the machine
+    # Power off the machine (unless this is an update test - we need to
-    power_off();
+    # run post steps in that case)
+    power_off() unless (get_var("ADVISORY_OR_TASK"));
 }
 
 sub test_flags {