add an option to manage anonymous user permissions by add-on within space permissions

Issue Summary

A customer wants to be able to configure permissions per add-on so that they can configure content access for anonymous users for each add-on instead of using global space permissions.

Steps to Reproduce

1. Select a space inside the Confluence.
2. Space Setting
3. Space Permissions
4. Add-on Tab
5. In this step you should be able to manage the anonymous user permissions for the chosen add-on.

Expected Results

Be able to configure custom content permissions for anonymous users in the app permissions

Actual Results

It is not possible to set custom content permissions for anonymous users. This can only be done for the out of the box permissions in the global space permissions UI which doesn't apply to apps custom content.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available.