Bug 1844827 - Update the cookie test expectations for iframe samesite...

Bug 1844827 - Update the cookie test expectations for iframe samesite r=cookie-reviewers,valentin a=RyanVM

Depends on D199770

Differential Revision: https://phabricator.services.mozilla.com/D199772

testing/web-platform/meta/cookies/samesite/setcookie-navigation.https.html.ini

@@ -2,5 +2,3 @@
   prefs: [network.cookie.sameSite.laxByDefault:true, network.cookie.sameSite.noneRequiresSecure:true]
   expected:
     if (os == "android") and fission: [OK, TIMEOUT]
-  [Cross-site to same-site iframe navigation should only be able to set SameSite=None cookies.]
-    expected: FAIL