[#980] Medlemmer af SEK kan nu se alle afdelinger, foreninger + div objekter

[mhewel]

Tilføjede rettigheder:
"view_all_unions": se alle foreninger.
"view_all_departments": Se alle afdelinger.
Rettede Aktiviteter, Invitation, Deltager, Afdelinger, Foreninger, Adresser til at bruge de nye rettigheder. SEK gruppen skal have to nye rettigheder

[what-the-diff]

PR Summary

• Enhanced Permission Checks Across Several Files
  The files activity_admin.py, activityinvite_admin.py, activityparticipant_admin.py, department_admin.py, and union_admin.py now have an additional condition. This condition will determine if the user has the newly defined permissions: members.view_all_departments or members.view_all_unions.

• Implemented Database Migration For New Permissions
  A new database migration file, 0046_alter_department_options_alter_union_options.py, has been added. This migration updates the Department and Union models to possess two new permissions: view_all_departments and view_all_unions.

• Improved Permission Checks in address.py
  An additional condition has been implemented in address.py. It checks if the user holds either of the new permissions: members.view_all_departments or members.view_all_unions.

• Added Permissions Attribute in department.py and union.py
  The files department.py and union.py have been updated with a new permissions attribute. This attribute includes the permissions view_all_departments and view_all_unions respectively.