Extract nvidia drivers to new role

[csibbitt]

All driver related code has moved to it's own role here: https://github.com/rhos-vaf/gpu-drivers-ansible

This is fully tested on my fork, it works with the CUDA Repo RPM driver and the vGPU Guest driver (installed from .run)

[csibbitt]

Evidence of testing:

[csibbitt@laptop rhos-vaf (⎈|openstack/api-rhos-lab-.../kube:admin:openstack)]$ oc delete ansibletest gpu-validation && oc apply -f ansibletest.yaml && sleep 20 && oc logs -f gpu-validation
[...]
TASK [gpu-validation : TEST[model_performance]Check the performance thresholds] ***
task path: /var/lib/ansible/ansible/gpu-validation/tasks/model_performance_assertions.yaml:2
ok: [gpu-validation-0] => {
    "failed_when_result": false,
    "performance_json": {
        "avg_time_per_tok": "0.01",
        "avg_time_to_first_tok": "0.021"
    }
}
[...]
PLAY RECAP *********************************************************************
gpu-validation-0           : ok=45   changed=21   unreachable=0    failed=0    skipped=16   rescued=0    ignored=0   
localhost                  : ok=20   changed=4    unreachable=0    failed=0    skipped=7    rescued=0    ignored=0   

[MiguelCarpio]

/lgtm