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

src/lib/media/picker.tsx

@@ -1,7 +1,11 @@
 import ExpoImageCropTool, {type OpenCropperOptions} from 'expo-image-crop-tool'
 import {type ImagePickerOptions, launchCameraAsync} from 'expo-image-picker'
 
-export {openPicker, type PickerImage as RNImage} from './picker.shared'
+export {
+  openPicker,
+  openUnifiedPicker,
+  type PickerImage as RNImage,
+} from './picker.shared'
 
 export async function openCamera(customOpts: ImagePickerOptions) {
   const opts: ImagePickerOptions = {