core: fix deletion of the osd-replace-config cm

MustDelete DeleteOption was set to `true` when deleting
osd-repalce-config configMap.  This cm won't existing after
all the OSDs get migrated. So deletion of the non-existent
cm will result in error. This PR removes `mustDelete: true` from
the DeletionOption when deleting osd-replace-config configmap

Signed-off-by: Santosh Pillai <sapillai@redhat.com>
(cherry picked from commit 8dd237b460)

pkg/operator/ceph/cluster/osd/osd.go

@@ -294,7 +294,7 @@ func (c *Cluster) Start() error {
 	}
 
 	if c.spec.Storage.Store.UpdateStore == OSDStoreUpdateConfirmation {
-		delOpts := &k8sutil.DeleteOptions{MustDelete: true, WaitOptions: k8sutil.WaitOptions{Wait: true}}
+		delOpts := &k8sutil.DeleteOptions{WaitOptions: k8sutil.WaitOptions{Wait: true}}
 		err := k8sutil.DeleteConfigMap(c.clusterInfo.Context, c.context.Clientset, OSDReplaceConfigName, namespace, delOpts)
 		if err != nil {
 			if kerrors.IsNotFound(err) {