Update Plex to use new configurable GPU support

- Replace extraVolumeMounts/extraVolumes with new gpu configuration
- Enable GPU support with cleaner, more maintainable config
- Use same /dev/dri paths for hardware-accelerated transcoding
- Leverages new kube-plex GPU feature for better integration

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

plex_values.yml

@@ -29,16 +29,11 @@ persistence:
   config:
     claimName: "plex-config"
 
-# for transcoding to use the GPU
-extraVolumeMounts:
-  - name: dev-dri
-    mountPath: /dev/dri
-
-extraVolumes:
-  - name: dev-dri
-    hostPath:
-      path: /dev/dri
-      type: Directory
+# GPU support for hardware-accelerated transcoding
+gpu:
+  enabled: true
+  hostPath: "/dev/dri"
+  mountPath: "/dev/dri"
 
 resources:
   requests: