Upgrading the NetBackup operator

1. Push the new operator images, NetBackup main image to container registry with different tags.
2. Update the new image name and tag in images section in kustomization.yaml file in operator folder available in the new package folder.
3. Update the node selector and tolerations in operator_patch.yaml file in operator/patches folder in the new package folder.
4. To upgrade the operator, apply the new image changes using the following command:

   kubectl apply -k <operator folder name>

   After applying the changes, new NetBackup operator pod will start in operator namespace and run successfully.