Add the allow_other parameter for the OBS storage plug

[lsjshilly]

mountFlags := []string{"big_writes", "max_write=131072", "use_ino"}

If the allow_other parameter is not modified, other users do not have the permission to access the persistent volume directory.

[chengxiangdong]

Hello,
by default, the allow_other attribute is not present. If needed, you can add it in mountOptions as follows:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: obs-sc
provisioner: obs.csi.huaweicloud.com
reclaimPolicy: Delete
mountOptions:
  - allow_other
parameters:
  acl: public-read-write