React 18 Upgrade

Part of https://github.com/openedx/platform-roadmap/issues/429

```[tasklist]
- [ ] https://github.com/openedx/frontend-app-discussions/pull/758
- [ ] https://github.com/openedx/frontend-app-discussions/pull/759
```