Rename tls component to cert-manager and consolidate (#2060)

This renames the tls component to cert-manager to reflect what it really
is. A kustomization.yaml file is added to cert-manager to make it
behave as a single component. This will make it easier to manage this
component, and allow for easier future replacement.

This is part of the feature-gated API functionality.

Signed-off-by: Todd Short <tshort@redhat.com>

Author: tmshort

config/components/tls/ca/issuers.yaml renamed to config/components/cert-manager/ca/issuers.yaml

@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1alpha1
+kind: Component
+# No namespace is specified here, otherwise, it will overwrite _all_ the other namespaces!
+components:
+- catalogd
+- operator-controller
+# ca must be last, other components will overwrite the namespace
+- ca