fix: Added compatibility code in aldryn_config go support setting THUMBNAIL_DEFAULT_STORAGE in django 4.2

[kinkerl]

Description

This change adds compatibility to django 4.2 and the new way storages and handled.

Related resources

https://docs.djangoproject.com/en/4.2/releases/4.2/#custom-file-storages

Checklist

• I have opened this pull request against master
• I have added or modified the tests when changing logic
• I have followed the conventional commits guidelines to add meaningful information into the changelog
• 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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (41b969d) 76.59% compared to head (8b569c2) 76.59%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1440   +/-   ##
=======================================
  Coverage   76.59%   76.59%           
=======================================
  Files          75       75           
  Lines        3546     3546           
  Branches      568      568           
=======================================
  Hits         2716     2716           
  Misses        667      667           
  Partials      163      163           

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