Add variant gnome-panel lockscreen needle for F37

For when this test runs on respins.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/gnome/apps/gnome-panel/panel_screen_locked-f37-20230406.json

@@ -0,0 +1,15 @@
+{
+  "area": [
+    {
+      "xpos": 482,
+      "ypos": 300,
+      "width": 56,
+      "height": 31,
+      "type": "match"
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "panel_screen_locked"
+  ]
+}