Django Cache Module: handle cache clusters

### Problem Statement

When using a cluster for caching the `LOCATION` property in the Django `CACHES` settings is a list of servers. Make sure we handle this case in `_get_address_port` here: https://github.com/getsentry/sentry-python/blob/antonpirker/django-caching-module/sentry_sdk/integrations/django/caching.py#L128

### Solution Brainstorm

We need to define what exactly should be sent so Sentry in that case.