MTC upgrade path will be affected by changed labelselectors on operands

Here is the upgrade error

```
2022-01-12T17:19:30.731Z    ERROR    controller.dataprotectionapplication    Reconciler error    {"reconciler group": "oadp.openshift.io", "reconciler kind": "DataProtectionApplication", "name": "velero", "namespace": "openshift-migration", "error": "Deployment.apps \"velero\" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string

{\"app.kubernetes.io/component\":\"server\", \"app.kubernetes.io/instance\":\"velero\", \"app.kubernetes.io/managed-by\":\"oadp-operator\", \"app.kubernetes.io/name\":\"velero\", \"openshift.io/oadp\":\"True\"}

, MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable"}
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
    /go/src/github.com/openshift/oadp-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:227
2022-01-12T17:20:11.692Z    INFO    controller.dataprotectionapplication    got provider secret name: cloud-credentials    {"reconciler group": "oadp.openshift.io", "reconciler kind": "DataProtectionApplication", "name": "velero", "namespace": "openshift-migration"}
2022-01-12T17:20:11.692Z    INFO    controller.dataprotectionapplication    got provider secret name: cloud-credentials-gcp    {"reconciler group": "oadp.openshift.io", "reconciler kind": "DataProtectionApplication", "name": "velero", "namespace": "openshift-migration"}
2022-01-12T17:20:11.692Z    INFO    controller.dataprotectionapplication    got provider secret name: cloud-credentials-azure    {"reconciler group": "oadp.openshift.io", "reconciler kind": "DataProtectionApplication", "name": "velero", "namespace": "openshift-migration"}
2022-01-12T17:20:11.711Z    ERROR    controller.dataprotectionapplication    Reconciler error    {"reconciler group": "oadp.openshift.io", "reconciler kind": "DataProtectionApplication", "name": "velero", "namespace": "openshift-migration", "error": "Deployment.apps \"velero\" is invalid: spec.selector: Invalid value: v1.LabelSelector{MatchLabels:map[string]string

{\"app.kubernetes.io/component\":\"server\", \"app.kubernetes.io/instance\":\"velero\", \"app.kubernetes.io/managed-by\":\"oadp-operator\", \"app.kubernetes.io/name\":\"velero\", \"openshift.io/oadp\":\"True\"}

, MatchExpressions:[]v1.LabelSelectorRequirement(nil)}: field is immutable"}
sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2
    /go/src/github.com/openshift/oadp-operator/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:227
```