Description of problem:
User allowed to move to next step when the the public subnet values are loading in ROSA Hypershift wizard step if the user has previously selected some public subnet data. This is wrong behavior and if the public subnet values are loading then wizard should not allow user to move forward.{}

Steps to reproduce:

1. Launch OCM UI.
2. Open on ROSA hypershift wizard.
3. Select the control plane as "Hosted" and click on "next" button
4. Provide account and roles definition from "Accounts and roles" step and click on "next" button.
5. Provide the name of the cluster and region details.
6. Proceed further and reach to "Networking" > "configuration" step.
7. Once the public subnet ids are loaded & selected and go back to "Cluster details" page.
8. Change the region ,  proceed to next steps and reach to "networking"> "Configuration" step.
9. Click on "next" button when the public subnet values are in loading.
10. View the behavior.

Actual results:

In Step 9, User allowed to move to next step although the  public subnet values are still loading. The value in "Review and create" page shown that the previously selected public subnet value in Step 7. This is wrong behavior.

Expected results:
Do not allow user to proceed to next step when subnet values are in loading state. Also handle public subnet field with clearing previously selected values while user navigation in wizards.

Please find attached screen recordings SubnetLoadingIssue.mp4