feat: integrate new bubbles (#10550)

To test this, set the `useNextBubble` value to `true` in the
localstorage. Here's a quick command to run in the console

```js
localStorage.setItem('useNextBubble', true)
```

```js
localStorage.setItem('useNextBubble', false)
```

---------

Co-authored-by: Pranav <pranavrajs@gmail.com>

app/javascript/dashboard/constants/localStorage.js

@@ -5,4 +5,5 @@ export const LOCAL_STORAGE_KEYS = {
   COLOR_SCHEME: 'color_scheme',
   DISMISSED_LABEL_SUGGESTIONS: 'labelSuggestionsDismissed',
   MESSAGE_REPLY_TO: 'messageReplyTo',
+  USE_NEXT_BUBBLE: 'useNextBubble',
 };