AWS - Adding snapshot_identifier to RDS and snapshot_id to ec2 options for snapshot restore

Adding ability to restore from snapshots

With most things being deployed via IaC and most prod environments having no clickops, it might be handy to allow people to be able to redeploy an RDS/EC2 with a previously saved snapshot.

Working through a database issue we have had arise with 17.1.0 (on a single node), was just considering how we could easily have a quick retore solution when we shift away from a single node and consuming an RDS instead.

It would be extremely fast and easy to just be able to define the snapshot ids in terraform and redeploy the working resources without having to do any manual interactions

• GET version: 3.3.1
• Cloud Provider: AWS
• Environment configuration: Terraform
• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/db_instance#snapshot_identifier
• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/instance#snapshot_id