Authz goroutine is not started when Kmesh starts

[tacslon]

What happened:
Kmesh starts, but authz goroutine is not started
What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:
Introduced in #464
Environment:

• Kmesh version: da15c80
• Others:

[tacslon]

cc @hzxuzhonghu