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/create-account.yml

@@ -32,6 +32,9 @@ appId: xyz.blueskyweb.app
     text: "Not Now"
     optional: true
 - inputText: "e2e-test"
+- extendedWaitUntil:
+    visible:
+        id: "handleAvailableCheck"
 - tapOn:
     id: "nextBtn"
-
+- assertVisible: "Give your profile a face"