Improve Dev Velocity for Terraform

[karkir0003]

Currently, when we write AWS infra using terraform, we have to run a set of manual commands to setup terraform along with validating + applying the tf plans. We should try to experiment with integrating these commands into dlp-cli. Below are some use cases we should add to the dlp-cli:

Deliverables

1. @MugPand , what instructions/steps did you follow to setup terraform?
   a. Implement a dlp-cli command to setup terraform for our use for DLP. We keep all terraform files in dlp-terraform/ directory
2. Implement a dlp-cli command to be able to validate terraform schemas across all .tf files in the dlp-terraform directory. We validate .tf files using terraform validate
3. Implement a dlp-cli command to be able to apply a .tf file by creating the resources in AWS. Eg: something like dlp-cli terraform apply dynamodb/ should run terraform apply within the dlp-terraform/dynamodb path for dynamodb.tf file
4. Modify our github actions checks to ensure that for a given .tf file, it's under a folder within dlp-terraform (like check valid folder schema within dlp-terraform directory

[noah-iversen]

@michellewliang if you don't have Terraform already, here's the instructions: https://developer.hashicorp.com/terraform/tutorials/aws-get-started/install-cli