Bumped fluent-ui dependencies (#2970)

- Bumped to latest minor version for `fluent-ui`
- Bumped react to 17, fixing react 16.14 in peer dependencies
- Removed unnecessary types for jest
- Updated `SelectWidget` to properly use the right `defaultSelectedKey[s]` prop based on multiple flag
- Updated test snapshots due to dependency bumps

Author: heath-freenome