home-assistant: Run as root in user namespace

Beginning with Home Assistant 2024.12, it is no longer possible to use
custom integrations if the container is running as an unprivileged user.
Fortunately, it can be "tricked" by running as root in an unprivileged
user namespace.

https://github.com/blakeblackshear/frigate-hass-integration/issues/762
https://github.com/home-assistant/core/issues/132336

home-assistant/home-assistant.yaml

@@ -74,15 +74,11 @@ spec:
           failureThreshold: 300
           periodSeconds: 3
           initialDelaySeconds: 3
-        securityContext:
-          runAsUser: 300
-          runAsGroup: 300
         volumeMounts:
         - name: home-assistant-data
           mountPath: /config
           subPath: data
-      securityContext:
-        fsGroup: 300
+      hostUsers: false
       volumes:
       - name: home-assistant-data
         persistentVolumeClaim: