When object-templates-raw is empty, policy continuously reconciles

Description of problem:

When a Policy contains an empty
object-templates-raw: |
Checking the Policy history, 5x a minute, there is a reconcile.  The message is:
notification - policy-namespace contains no object templates to check, and thus has no violations

Version-Release number of selected component (if applicable):

2.8 latest: ACM:2.8.0-SNAPSHOT-2023-06-01-18-13-26

How reproducible:

Always

Steps to Reproduce:

1. Create a policy that results in an empty 
   object-templates-raw

spec:
  evaluationInterval:
      compliant: 2h
      noncompliant: 45s
  object-templates-raw: |
    {{- if eq (lookup "operator.openshift.io/v1" "IngressController" "openshift-ingress-operator" "default").metadata.name "default" }}
    - complianceType: musthave

Actual results:

Continuous entries

Expected results:

Single entry until the policy evaluates to include an object-template resource

Additional info: