Enable whitespace rendering on selection in Monaco (#24444) (#24485)
Backport #24444 by @silverwind
Remove the
[renderWhitespace](https://microsoft.github.io/monaco-editor/docs.html#interfaces/editor.IEditorOptions.html#renderWhitespace)
override, so the default value of `selection` takes over and makes
whitespace visible on selection.
<img width="128" alt="Screenshot 2023-04-30 at 19 09 41"
src="https://user-images.githubusercontent.com/115237/235366707-d598268d-03cc-4839-a195-c460bddae99b.png">
Co-authored-by: silverwind <me@silverwind.io>
