Add tests to ensure that infrastructure-components.yaml matches the vendored CAPI provider.

Background:

We manually vendor code for the capi providers: https://github.com/openshift/installer/tree/master/cluster-api/providers

As part of this process it is also required to copy infrastructure-components.yaml from the capi provider (into /data/data/clusterapi).

We should test that the infrastructure-components for the platform matches the vendored provider.

We can do this by checking out the provider at the same revision as vendored into the installer, run `make release-manifests` and compare `out/infrastructure-components.yaml` in the provider with the one vendored in the installer.