One Gitlab runner for each tool ?

Hi everyone, I'm currently doing a research on CI\CD for IaC. My background is Networking and I'm evolving my career into DevOPs.

I have diffèrent tools to work with them in a single project ( Terraform, Ansible, cloud-init, microK8s, harbor..). What I would like to do is having all of this code in one GitLab runner for execution. I'm trying to understand if this is the right thing to do or it should be a specific runner for every tool.