[Bug]: Error: creating RDS DB Instance

### Installation method

Own AWS account

### What happened?

ec2-user:~/environment:$ prepare-environment networking/securitygroups-for-pods

Hands-on labs for Amazon Elastic Kubernetes Service

🚀 We're preparing your environment for the next lab, sit tight!
📦 Refreshing copy of workshop repository from GitHub...

🎓 Tip: Read the rest of the lab introduction while you wait!

Deleting Security Group policies...

⏳ Waiting for application to become ready...

🔃 Cleaning up previous lab infrastructure...

🚧 Creating infrastructure for next lab...
╷
│ Error: creating RDS DB Instance (eks-workshop-catalog): operation error RDS: CreateDBInstance, https response error StatusCode: 400, RequestID: 6399ce33-d20a-4f2d-ac4e-7fb57316c495, api error InvalidParameterValue: Unable to create the resource. Verify that you have permission to create service linked role. Otherwise wait and try again later
│
│ with module.lab.module.preprovision[0].module.catalog_mysql.module.db_instance.aws_db_instance.this[0],
│ on /eks-workshop/terraform-data/modules/lab.preprovision.catalog_mysql/modules/db_instance/main.tf line 30, in resource "aws_db_instance" "this":
│ 30: resource "aws_db_instance" "this" {
│
╵
🚨 An error occurred, please contact your workshop proctor or raise an issue at https://github.com/aws-samples/eks-workshop-v2/issues
The full log can be found here: /eks-workshop/logs/action-1756750169.log

### What did you expect to happen?

expected RDS DB Instance to be created

### How can we reproduce it?

prepare-environment networking/securitygroups-for-pods

### Anything else we need to know?

_No response_

### EKS version

1.33

Start by reproducing `prepare-environment networking/securitygroups-for-pods` and review the full log at `/eks-workshop/logs/action-1756750169.log`. Inspect the referenced Terraform resource at `modules/lab.preprovision.catalog_mysql/modules/db_instance/main.tf`, focusing on the RDS creation failure and service-linked-role permission error; done means the expected RDS DB instance is created.

Written by the indexing model from the issue text.