Add serverlessv2_scaling_configuration to secondary cluster

[raymondchen625]

what

Add aurora serverlessv2 support for configuration of cluster_type="global".

why

In the PR #138 , the serverlessv2_scaling_configuration argument was only added to the resource aws_rds_cluster.primary, which is in effect when clsuter_type is regional. It should also be added to the resource aws_rds_cluster.secondary to cover the case when cluster_type is global.

references

#138

[raymondchen625]

I pushed a new commit b194b10.

• It adds the db_cluster_instance_class to the secondary cluster similar to the serverlessv2_scaling_configuration.
• The aws_rds_cluster_instance.instance_class only uses the value from var.instance_type because I'm trying to use the serverlessv2_scaling_configuration to handle the issue Action of deleting serverlessv2_scaling_configuration has no effect #168: Once my cluster creates a serverless reader and deletes it later, the describe-db-clusters API call will always have a new ServerlessV2ScalingConfiguration field. There is no way to delete it. From what I see in the AWS Provider's source code, this change is ignored. The next terraform plan will detect the change to delete this ServerlessV2ScalingConfiguration setting again. As a workaround before AWS API and the terraform provider provide the capability to delete it, I'd like to add the ServerlessV2ScalingConfiguration in my TF config to match the response from AWS API to silence the detected changes. The previous condition makes this workaround impossible.

[goruha]

/terratest

[raymondchen625]

/terratest