Support showing the current storage status in store topology

[rleungx]

Feature Request

Is your feature request related to a problem? Please describe: N/A

Describe the feature you'd like:

It's better to show the current storage status on each topology level so that the users can easily scale in/out the cluster. And we can also benefit from it since we can utilize it to find out how scheduling works.

Describe alternatives you've considered:

N/A

Teachability, Documentation, Adoption, Migration Strategy:

N/A