Updated ENABLE_RESTRICTED_APP_ACCESS for potential list value

[ckrew]

Description

Currently the ENABLE_RESTRICTED_APP_ACCESS is set to be a boolean. If False, all apps are accessible to everyone. If True, then no apps are accessible unless given explicit permissions. This causes an issue if I only want 1 or a few apps restricted and leave the rest accessible to everyone.

This PR aims to fix that by maintaining previous capabilities of a boolean value but also adding the option to provide a list of restricted applications. If an application is provided in the list, then that application will only be accessible by admins and those given explicit permissions.

Changes Made to Code:

• Added logic to the existing utilities function that checks for apps in a restricted list if the setting is a list

Additional Notes

• No expected results had to be changed in tests which means it should not cause any breaking issues in current portals

Quality Checks

• New code is 100% tested
• Code has been formated
• Code has been linted
• Docstrings for new methods have been added

[coveralls]

coverage: 100.0%. remained the same
when pulling 1bdf319 on restricted_app_access_list
into da1d12a on main.

[swainn]

LGTM, but I want @sdc50 to review and comment since the impetus for this feature originally came from his needs.

[sdc50]

I don't have a direct need for this capability currently, but I can see how it could be useful. It seems to work well for me with both native and proxy apps.