Updates benchmarking scripts for testing different disk types

This change makes some improvements to the benchmarking environment so that it is easier to adjust instance and disk types.

• Updates to the latest Ansible, some small changes to remove warnings
• Uses a python venv and version file so we can test against a stable ansible/terraform combination
• Creates a config.yml for setting instance and disk types.

Part of https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/17035