Bug 1703965 [wpt PR 28420] - Update wpt metadata, a=testonly

wpt-pr: 28420
wpt-type: metadata

testing/web-platform/meta/managed/managed-config-error.https.window.js.ini

@@ -1,2 +1,10 @@
 [managed-config-error.https.window.html]
-  expected: ERROR
+  [Number instead of keys]
+    expected: FAIL
+
+  [Empty key list]
+    expected: FAIL
+
+  [Dictionary instead of list]
+    expected: FAIL
+

testing/web-platform/meta/managed/managed-config-success.https.window.js.ini

@@ -1,2 +1,19 @@
 [managed-config-success.https.window.html]
-  expected: ERROR
+  [App is not managed.]
+    expected: FAIL
+
+  [Configuration is returned]
+    expected: FAIL
+
+  [Selected keys are returned.]
+    expected: FAIL
+
+  [Only existing keys are returned.]
+    expected: FAIL
+
+  [Values can be of any type]
+    expected: FAIL
+
+  [A change in managed configuration is observed.]
+    expected: FAIL
+