Adding new Civo cluster integration

What does this MR do and why?

This MR is for adding Civo Kubernetes integration within GitLab. working repository with relevant terraform files - https://gitlab.com/civocloud/gitlab-terraform-civo

Screenshots or screen recordings

pipeline success variables created cluster created with agent installed

How to set up and validate locally

The steps in this MR are the steps that can be used to test locally.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Yes, I have evaluated the MR acceptance checklist for this MR.