fix(longhorn): remove invalid ext4 mount options uid=26,gid=26 from longhorn-cnpg

uid/gid are FAT/NTFS/FUSE mount options, not ext4. Caused mount exit 32
on every newly provisioned CNPG PVC, blocking authentik-db initdb.
CNPG handles postgres ownership via its own init container.

k8s/infra/longhorn/longhorn-cnpg-storageclass.yaml

@@ -35,8 +35,5 @@ parameters:
   mkfsParams: "-O ^64bit,^metadata_csum"
 mountOptions:
   - "noatime"
-  # Critical: mount with postgres UID/GID (26:26) to avoid permission issues
-  - "uid=26"
-  - "gid=26"
 reclaimPolicy: Delete
 volumeBindingMode: Immediate