RDS DB Proxy and Target Group

This template creates a DB proxy and registers a DB instance. It creates an AWS::RDS::DBProxy resource with properties such as DebugLogging, DBProxyName, EngineFamily, IdleClientTimeout, RequireTLS, Auth, and VpcSubnetIds. It also creates an AWS::RDS::DBProxyTargetGroup resource with properties such as DBProxyName, DBInstanceIdentifiers, TargetGroupName, and ConnectionPoolConfigurationInfo. It includes an IAM role to allow the template to access the secret which stores the RDS database password