Auto DevOps: Upgrade to apps/v1 Deployment

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Issue

We currently use Helm to deploy with --wait. --wait however does not respect Deployments extensions/v1beta1 (Helm issue).

So we added a workaround using kubectl rollout status.

Solution

• Update templates/deployment.yaml to use apps/v1
• Remove the kubectl rollout status workaround

See also discussion from gitlab-ce!28130:

> Sorry for coming later into this. Have we considered simply removing the rollout check ? The check was added to workaround an issue with `--wait` in Helm. 
> 
> EDIT: Ah, the issue was https://gitlab.com/gitlab-org/gitlab-ci-yml/merge_requests/195. Okay we will need the rollout check until [`deployment.yaml`](https://gitlab.com/gitlab-org/charts/auto-deploy-app/blob/master/templates/deployment.yaml) is upgraded to `apps/v1` from `extensions/v1beta1`