[bug] when storage size shrink, and change replicas, It will reconcile fail forever.

[acekingke]

Describe the problem

To Reproduce

1. set replicas to 2 and storage size to 50Gi
2. then set replica to 3 and storage size to 20Gi
3. it will still at replica 2 , and cluster is nerver ready

Expected behavior

shrink storage size is not allowed, but the reconcile should be successful.

Environment:

• RadonDB MySQL version:

[andyli029]

ACK.

[andyli029]

fixed by #487