package-server-manager does not stomp on changes made to packgeserver CSV

Before the {product-title} {product-version} release, the `package-server-manager` controller would not revert any changes made to a `package-server` cluster service version (CSV), because of an issue with the `on-cluster` function. These persistent changes might impact how an Operator starts in a cluster. For {product-title} {product-version}, the `package-server-manager` controller always rebuilds a `package-server` CSV to its original state, so that no modifications to the CSV persist after a cluster upgrade operation. The `on-cluster` function no longer controls the state of a`package-server` CSV. (link: https://issues.redhat.com/browse/OCPBUGS-867 [* OCPBUGS-867 *])