[BUG] CSI Plugin fails with "Invalid character 'U' looking for beginning of value"

[cheyang]

What is your environment(Kubernetes version, Fluid version, etc.)

Describe the bug

This error is because the token accessing the kubelet api will return Unauthorized, and it is returned as msg, and csi will report this error when it parses Unauthorized as a normal return value.

What you expect to happen:

How to reproduce it

Additional Information