Fix & reenable RichTextEditor storyshots

[mnholtz]

When adding #9336, storyshots was failing for the RichTextEditor story with the following stack trace:

  ● Storyshots › Components/RichTextEditor › With Initial Content

    TypeError: Cannot read properties of null (reading 'append')

      at PureEditorContent.init (node_modules/@tiptap/react/src/EditorContent.tsx:133:15)
      at PureEditorContent.componentDidMount (node_modules/@tiptap/react/src/EditorContent.tsx:116:10)
      at commitLifeCycles (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:11782:24)
      at commitLayoutEffects (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:14443:7)
      at HTMLUnknownElement.callCallback (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:11391:14)
      at Object.invokeGuardedCallbackDev (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:11440:16)
      at invokeGuardedCallback (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:11499:31)
      at commitRootImpl (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:14172:9)
      at unstable_runWithPriority (node_modules/scheduler/cjs/scheduler.development.js:468:12)
      at runWithPriority (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:2486:10)
      at commitRoot (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:14011:3)
      at performSyncWorkOnRoot (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:13440:3)
      at node_modules/react-test-renderer/cjs/react-test-renderer.development.js:2537:26
      at unstable_runWithPriority (node_modules/scheduler/cjs/scheduler.development.js:468:12)
      at runWithPriority (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:2486:10)
      at flushSyncCallbackQueueImpl (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:2532:9)
      at flushSyncCallbackQueue (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:2519:3)
      at scheduleUpdateOnFiber (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:13004:9)
      at updateContainer (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:16454:3)
      at create (node_modules/react-test-renderer/cjs/react-test-renderer.development.js:17149:3)
      at getRenderedTree (node_modules/@storybook/addon-storyshots/dist/frameworks/react/renderTree.js:12:18)
      at node_modules/@storybook/addon-storyshots/dist/test-bodies.js:9:24
      at Object.<anonymous> (node_modules/@storybook/addon-storyshots/dist/api/snapshotsTestsTemplate.js:20:29)

After some digging we decided to disable storyshot tests to address as a follow-up.

Possible threads to pull:

• Storyshots uses jsdom, which we already had to stub for TipTap for jest unit tests