OCPBUGS-45901: Remove namespace from ConsolePlugin YAML

The ConsolePlugin resource is cluster-scoped. It should not have a
`metadata.namespace` in its YAML manifest.

charts/openshift-console-plugin/templates/consoleplugin.yaml

@@ -2,7 +2,6 @@ apiVersion: console.openshift.io/v1
 kind: ConsolePlugin
 metadata:
   name: {{ template "openshift-console-plugin.name" . }}
-  namespace: {{ .Release.Namespace }}
   labels:
     {{- include "openshift-console-plugin.labels" . | nindent 4 }}
 spec:
@@ -15,4 +14,4 @@ spec:
       name: {{ template "openshift-console-plugin.name" . }}
       namespace: {{ .Release.Namespace }}
       port: {{ .Values.plugin.port }}
-      basePath: {{ .Values.plugin.basePath }}
+      basePath: {{ .Values.plugin.basePath }}