Remove Writefull.enabled (#31476)

* feat: migrate from aiErrorAssist naming for disabling AI features to aiFeatures.enabled to avoid confusion

feat: keep aiErrorAssistant as setting on user object until migration is run

* feat: migrate writefull.enabled unset to instead use promotionSet false

* feat: remove wf.enabled in favor for aiFeatures.enabled for display, and writefull.promotionSet for determining if we should autoload or autocreate

GitOrigin-RevId: 2b7a5b8a430a804f6c9804cc926cb5c057e34df5

services/web/scripts/e2e_test_setup.mjs

@@ -38,8 +38,8 @@ async function createUser(email) {
         // Override features.
         features,
         featuresOverrides: [{ features }],
-        // disable Writefull
-        'writefull.enabled': false,
+        // disable AI features
+        'aiFeatures.enabled': false,
       },
     }
   )