Add HorizontalPodAutoscaler permission for operator role

The Certificate from cert-manager customer resource was not added to permission
set for operator Role. The operator during GC operation log the following
message:
```
W1106 11:46:57.392913       1 reflector.go:547] pkg/mod/k8s.io/[email protected]/tools/cache/reflector.go:232: failed to list *v1.Certificate: certificates.cert-manager.io is forbidden: User "system:serviceaccount:redpanda:redpanda-operator" cannot list resource "certificates" in API group "cert-manager.io" in the namespace "redpanda"
E1106 11:46:57.392992       1 reflector.go:150] pkg/mod/k8s.io/[email protected]/tools/cache/reflector.go:232: Failed to watch *v1.Certificate: failed to list *v1.Certificate: certificates.cert-manager.io is forbidden: User "system:serviceaccount:redpanda:redpanda-operator" cannot list resource "certificates" in API group "cert-manager.io" in the namespace "redpanda"
```

Author: RafalKorepta

charts/operator/rbac.go

@@ -522,7 +522,7 @@ func Roles(dot *helmette.Dot) []rbacv1.Role {
 					Resources: []string{"jobs"},
 				},
 				{
-					Verbs:     []string{"create", "delete", "get", "patch", "update"},
+					Verbs:     []string{"create", "delete", "get", "patch", "update", "list"},
 					APIGroups: []string{"cert-manager.io"},
 					Resources: []string{"certificates"},
 				},