Description of problem:

logVerbosity value must be between 1 and 6 is inconsistent with backend and ocp.

How reproducible:
always

Steps to Reproduce:

1. Open OCM UI staging.
2. Open ROSA cluster 
3. Go to machine pool tab and click "Edit cluster autoscaling"
4. Check logVerbosity values

Actual results:

Value must be between 1 and 6. But in backend and rosa cli, it only check this value must be non-negative. such as "rosa create cluster --cluster-name zhsun --autoscaler-log-verbosity 7" can create cluster successfully. rosa version 1.2.26.                                                                                                                         

Expected results:

logVerbosity only check value must be non-negative. 

Additional info:

backend pr: https://gitlab.cee.redhat.com/service/uhc-clusters-service/-/merge_requests/6132