Enable CAPZ to be deployed using ArgoCD automatically

[dtzar]

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x] feature request
- [ ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

terraform apply -var gitops_addons_revision=capzargocd --auto-approve

Any log messages given by the failure

See kubernetes-sigs/cluster-api-operator#562

Expected/desired behavior

CAPI-Operator successfully and permanently installs CAPI and the infrastructure provider while using ArgoCD.