Create a CICD pipeline to deploy a vmf-instance with Terraform

We need to create a CI/CD pipeline to automate the Terraform deployment of vmf-instance. This pipeline should create a plan and then apply it. It should also facilitate a way to destroy resources. This pipeline should also manage the state stored in Gitlab, so the team can work from the current state. Fortunately, GitLab handles state locking while performing operations.

This effort will help us turn it into a Gitlab cicd component that can be used in other/current projects.