Improve e2e tests (#8927)

* get e2e image picker working

* verify create account actually reaches onboarding

* wait for image to actually be attached before posting

* wait until login finishes before moving on

* sign out before switch accounts then wait until logged in

* disable onboarding experiments in e2e

* add testId to handle availability checkmark

* fix too long username

* update thread muting test to reflect current behaviour

* hackfix for the british english translation

* unflake the onboarding tests

* fix curate list flow

* admit defeat on the most list one

__e2e__/flows/shared-prefs.yml

@@ -8,8 +8,12 @@ appId: xyz.blueskyweb.app
     file: ../setupApp.yml
 - tapOn:
     id: "e2eSignInAlice"
+- extendedWaitUntil:
+    visible:
+      id: "viewHeaderHomeFeedPrefsBtn"
+
 - assertVisible:
-      id: "storybookBtn"
+    id: "storybookBtn"
 - tapOn:
     id: "storybookBtn"
 - tapOn: