Updating rbacs and logging error

[Fiona-Waters]

Resolves #81

While working through the quick start guide instascale logs showed that the instascale-ocm-secret could not be found.
I updated the rbacs to include secrets. I also updated the error log to include the related error in the output.

[anishasthana]

These are two independent changes -- they should be two separate commits. One for the logging change, one for the role change.

[codificat]

I am testing instascale on an OSD cluster and I am seeing RBAC issues too.

Besides the Secret access covered so far, my logs also complain about ClusterVersion:

W0616 10:28:53.704620 1 reflector.go:324] go/pkg/mod/k8s.io/client-go@v0.23.0/tools/cache/reflector.go:167: failed to list *v1.ClusterVersion: clusterversions.config.openshift.io is forbidden: User "system:serviceaccount:opendatahub:instascale-instascale-sa" cannot list resource "clusterversions" in API group "config.openshift.io" at the cluster scope
E0616 10:28:53.704644 1 reflector.go:138] go/pkg/mod/k8s.io/client-go@v0.23.0/tools/cache/reflector.go:167: Failed to watch *v1.ClusterVersion: failed to list *v1.ClusterVersion: clusterversions.config.openshift.io is forbidden: User "system:serviceaccount:opendatahub:instascale-instascale-sa" cannot list resource "clusterversions" in API group "config.openshift.io" at the cluster scope

which seems to come from

instascale/controllers/machinepools.go

Lines 86 to 90 in 810f6c0

	cv := &configv1.ClusterVersion{}
	err := r.Client.Get(context.TODO(), types.NamespacedName{Name: "version"}, cv)
	if err != nil {
	return fmt.Errorf("can't get clusterversion: %v", err)
	}

I believe this should also be added