AKS - can't update some input fields if the save request fails

[mantis-toboggan-md]

Describe the bug

To Reproduce

1. Attempt to provision an AKS cluster with a configuration that will fail (eg, try to re-use the name of an existing cluster)
2. After hitting save, attempt to change the cluster name.
   Result
   The cluster name input can't be edited: the input is immediately re-populated with the old value. The same appears to be true of the description and cluster resource group inputs. The node inputs also become disabled.

Expected Result
When creating a new AKS cluster, if the save action fails, the entire form should be editable.

Screenshots
(in this video, I am mashing backspace)

Screen.Recording.2024-05-21.at.4.06.59.PM.mov

Additional context