Description of problem:

In ROSA Hypershift cluster wizard > Under machine pool step, For some VPC private subnet names shown as [object object] wrongly. Probably this is due to  missing name properties from the backend subnet definition. We need to handle it properly and show them correctly on UI (ex: show subnet id in case of missing name).

Steps to reproduce:

1. Launch OCM UI staging
2. Open ROSA Hypershift wizard.
3. Reach to machine pool step after filling required values in each step.
4. Select VPC and try to select the private subnet names for machine pool.
5. Repeat above steps with random VPCs shown in the list.

Actual results:

Private subnet name shown as "[object object]"  wrongly under machine pool step from wizard. The backend response indicate that there is missing name property for vpc request response.

Expected results:

Do not show "[object object]" value under private subnet for machine pool set. Suggestion is to show the subnet id If the name is missing from backend response.