fix: revert GITLAB_TERRAFORM_IMAGES_VERSION

Description

The new tools-container version is broken. Let's revert GITLAB_TERRAFORM_IMAGES_VERSION.

Supporting information

https://gitlab.com/opencraft/ops/grove-stage-digitalocean/-/pipelines/731205541

Testing instructions

Steps to test the changes:

1. Proofread

Dependencies

N/A

Screenshots

N/A

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

Additional context

N/A