PB-3588: ApplicationBackupSpec NamespaceSelector schema change from a map to the string

Signed-off-by: Santosh Kumar Gajawada <sgajawada@purestorage.com>

Author: sgajawada-px

pkg/apis/stork/v1alpha1/applicationbackup.go

@@ -33,7 +33,7 @@ type ApplicationBackupSpec struct {
 	PlatformCredential string                             `json:"platformCredential"`
 	RancherProjects    map[string]string                  `json:"rancherProjects"`
 	Selectors          map[string]string                  `json:"selectors"`
-	NamespaceSelector  map[string]string                  `json:"namespaceSelector"`
+	NamespaceSelector  string                             `json:"namespaceSelector"`
 	PreExecRule        string                             `json:"preExecRule"`
 	PostExecRule       string                             `json:"postExecRule"`
 	ReclaimPolicy      ApplicationBackupReclaimPolicyType `json:"reclaimPolicy"`

pkg/apis/stork/v1alpha1/zz_generated.deepcopy.go

@@ -253,7 +253,7 @@ func (a *ApplicationBackupController) handle(ctx context.Context, backup *stork_
 		return nil
 	}
 	if labelSelector := backup.Spec.NamespaceSelector; len(labelSelector) != 0 {
-		namespaces, err := core.Instance().ListNamespaces(labelSelector)
+		namespaces, err := core.Instance().ListNamespacesV2(labelSelector)
 		if err != nil {
 			errMsg := fmt.Sprintf("error listing namespaces with label selectors: %v, error: %v", labelSelector, err)
 			log.ApplicationBackupLog(backup).Error(errMsg)