feat: Autocomplete fields for grouper selection and option for less verbose UI

Description

This PR adds autocomplete fields and some minimal styling to the grouper form when accessing the version change list:

Before this was a classical select drop-down which quickly gets difficult to handle with a growing number of pages or other grouper objects.
Option for less verbose UI: Setting DJANGOCMS_VERSIONING_VERBOSE_UI ? False will remove the version change lists from the admin index view (to not clutter it). Version management is still accessible through the versioned models' admins. Also, it will make the version change list less wide by removing the created by date for easier access to the action buttons:

[x] I have opened this pull request against master
[ ] I have added or modified the tests when changing logic
[x] I have followed the conventional commits guidelines to add meaningful information into the changelog
[x] I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.