Ensure termination protection is enabled for AWS EMR clusters

AWS EMR clusters have termination protection disabled which may shut down EC2 instances by accident.

In AWS Console -

1. Sign in to AWS Console and go to Amazon EMR console.
2. Choose Create cluster.
3. Choose Go to advanced options.
4. On the General Cluster Settings step, under General Options make sure Termination protection is selected.

In Terraform -

1. In the aws_emr_cluster resource, set the termination_protection field to true.

References:
https://docs.aws.amazon.com/emr/latest/ManagementGuide/UsingEMR_TerminationProtection.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/emr_cluster#termination_protection