Update provisioner forms with latest RDS and EKS machine types

[abelanger5]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Other (please describe): infra options updates

Pull request checklist

Please check if your PR fulfills the following requirements:

• If it's a backend change, tests for the changes have been added and go test ./... runs successfully from the root folder.
• If it's a frontend change, Prettier has been run
• Docs have been reviewed and added / updated if needed

What is the current behavior?

RDS PG version 12.10 was released, and instance types aren't updated for custom infra.

What is the new behavior?

Update to latest.

Technical Spec/Implementation Notes