feature: namespace deletion member service account (#1250)

The registration service uses the member service account to be able to
interact with the member clusters. In order to be able to delete the
user namespaces to trigger a reconciliation from the NSTemplateSet
controller, we need the service account to have the "delete" permission
too.

SANDBOX-1067

Co-authored-by: Francisc Munteanu <fmuntean@redhat.com>

Author: MikelAlejoBR

testsupport/wait/member.go

@@ -2657,7 +2657,7 @@ func (a *MemberAwaitility) WaitForToolchainClusterResources(t *testing.T) {
 		{
 			APIGroups: []string{""},
 			Resources: []string{"namespaces"},
-			Verbs:     []string{"get", "list", "watch"},
+			Verbs:     []string{"delete", "get", "list", "watch"},
 		},
 		{
 			APIGroups: []string{""},