ocm: add ManagedCluster and unit tests (#416)

Co-authored-by: Dmitry Dmitriev <ddmitrie@redhat.com>

Author: klaskosk

.golangci.yml

@@ -32,6 +32,7 @@ linters-settings:
           - "open-cluster-management.io/governance-policy-propagator/api"
           - "open-cluster-management.io/governance-policy-propagator/api/v1beta1"
           - "open-cluster-management.io/multicloud-operators-subscription/pkg/apis/apps/placementrule/v1"
+          - "open-cluster-management.io/api"
           - "sigs.k8s.io/controller-runtime"
           - "github.com/stretchr/testify"
           - $gostd

go.mod

@@ -54,6 +54,7 @@ require (
 	github.com/stmcginnis/gofish v0.17.0
 	github.com/stretchr/testify v1.9.0
 	github.com/vmware-tanzu/velero v1.12.1
+	open-cluster-management.io/api v0.12.0
 )
 
 require (