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.e2e.tsx

@@ -7,6 +7,7 @@ import ExpoImageCropTool, {type OpenCropperOptions} from 'expo-image-crop-tool'
 
 import {compressIfNeeded} from './manip'
 import {type PickerImage} from './picker.shared'
+import {ImagePickerResult} from 'expo-image-picker'
 
 async function getFile() {
   const imagesDir = documentDirectory!
@@ -38,6 +39,22 @@ export async function openPicker(): Promise<PickerImage[]> {
   return [await getFile()]
 }
 
+export async function openUnifiedPicker(): Promise<ImagePickerResult> {
+  const file = await getFile()
+
+  return {
+    assets: [
+      {
+        type: 'image',
+        uri: file.path,
+        mimeType: file.mime,
+        ...file,
+      },
+    ],
+    canceled: false,
+  }
+}
+
 export async function openCamera(): Promise<PickerImage> {
   return await getFile()
 }