Description of problem:

Subscription creation throws an following error:
Placement.cluster.open-cluster-management.io "busybox-2-placement-1" is invalid: spec.predicates[0].requiredClusterSelector.labelSelector.matchExpressions[0].values[0]: Invalid value: "boolean": spec.predicates[0].requiredClusterSelector.labelSelector.matchExpressions[0].values[0] in body must be of type string: "boolean"

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

2.8.1

How reproducible:

100%

Steps to Reproduce:

1. All Clusters -> Application -> Create application -> choose Subscription
2. Fill the following info:
   Name: busybox-2
   Namespace:  busybox-2
   Repository types: Git
   URL: https://github.com/RamenDR/ocm-ramen-samples
   Branch: main
   Path: busybox-odr
3. Select -> Deploy application resources on clusters with all specified labels
4. Choose Cluster sets
5. Label: local-cluster   Value: true
6. Click Create

Actual results:

Expected results:

Additional info: