[BB-6444][BB-6461] Minikube provider

Description

Adds minikube provider, that can be used for local testing of Grove.

Testing instructions

Steps to test the changes:

1. Create minikube cluster as described here.
2. Follow the getting started guide here. Set TF_VAR_cluster_name and TF_VAR_cluster_provider to minikube.
3. When you create your instance, before triggering deployment, set RUN_MYSQL and RUN_MONGODB to true, and remove s3 from the plugins list.

Dependencies

• grove-template!25 (merged)

Checklist

If any of the items below is not applicable, do not remove them, but put a check in it.

• All providers include the new feature/change
• All affected providers can provision new clusters
• Unit tests are added/updated
• Documentation is added/updated
• The TOOLS_CONTAINER_IMAGE_VERSION in ci_vars.yml is updated
• The grove-template repository is updated