Description of problem:

When adding new node pools to a hosted cluster, any new node pools added must be in the same availability zone and subnet as per Hypershift docs.

In the UI, when hit "add node pool" we are allowing the user to edit this field. By default we should hide this field and automatically populate it in the NodePool resource instead when they hit Add.

Version-Release number of selected component (if applicable):

2.7.0-DOWNSTREAM-2022-11-15-16-49-09

How reproducible:

Always

Steps to Reproduce:

1. Created a hosted cluster
2. go to "cluster nodes" and hit "add node pool"
3. ...

Actual results:

Expected results:

Additional info: