WHY
We had a recent customer issue, OHSS-24889 

Summary of cluster issue: 

• STS: true, PrivateLink: true, 
• the RDS was gone from aws
• VPCs were showing error setting connection rules
• the postgres crd instance on the cluster was not removed and was blocking addon uninstallation
• we had to manually remove the finalizer to unblock the uninstallation
• we ask whether it is necessary to create RDS before vpc connection rules are set successfully

WHAT
Investigate how this scenario might occur and steps to resolve.

We also need to understand how a clean uninstall can proceed. 

One theory was the following:

• The Postgres CR created but never reconciled as it could not reach AWS
• On uninstall, it could not delete the Postgres CR as it could not reach AWS

However, this does not explain how the VPC may have been created.