Story (Required)
As a QE running tests, I need to know the architecture of the cluster.
Background (Required)
We specify the param ARCH in acceptance-tests, cluster-upgrade-tests and upgrade-tests.
Approach (Required)
Get the cluster architecture from cluster itself, similarly to how we get cluster version from cluster in task get-cluster-version and then export it as a result.
Since the task will now export not only version, we could rename it to "get-cluster-info"