net-mgmt/netbox: Create Django 5.0 consumers

* Django 4.2 is currently the "default" version in the ports tree due
  its long term support until April 2026.  Thus ports that are assigned
  to that version will exist until then.

  The following ports are required to make the upgrade of
  net-mgmt/netbox to the 4.0 release possible because it requires
  Django 5.0.

  All of the ports listed below were created on the basis of their
  respective original ports:

  - devel/py-dj50-django-rq
  - devel/py-dj50-strawberry-graphql
  - www/py-dj50-django-auth-ldap
  - www/py-dj50-django-choices-field
  - www/py-dj50-django-cors-headers
  - www/py-dj50-django-debug-toolbar
  - www/py-dj50-django-filter
  - www/py-dj50-django-htmx
  - www/py-dj50-django-graphiql-debug-toolbar
  - www/py-dj50-django-js-asset
  - www/py-dj50-django-mptt
  - www/py-dj50-django-prometheus
  - www/py-dj50-django-redis
  - www/py-dj50-django-rich
  - www/py-dj50-django-tables2
  - www/py-dj50-django-taggit
  - www/py-dj50-django-timezone-field
  - www/py-dj50-djangorestframework
  - www/py-dj50-drf-spectacular
  - www/py-dj50-drf-spectacular-sidecar
  - www/py-dj50-strawberry-graphql-django

  Happy to pass the following ports to its maintainer who already
  maintain the Django 4.2 variants of them:

  - devel/py-dj50-django-rq
  - www/py-dj50-django-debug-toolbar
  - www/py-dj50-django-redis