Provide readable timestamps in the logs

[nixpanic]

Times of log messages are in a format that is difficult to read format:

1.6593560518327549e+09	INFO	Making controller reclaim space request	{"controller": "reclaimspacejob", "controllerGroup": "csiaddons.openshift.io", "controllerKind": "ReclaimSpaceJob", "reclaimSpaceJob": {"name":"sample-1","namespace":"default"}, "namespace": "default", "name": "sample-1", "reconcileID": "dc87e88f-318a-40be-a87b-63151495d4d3", "PVCName": "rbd-pvc", "PVCNamespace": "default", "PVName": "pvc-82801af6-dccb-4323-a08c-743766b74028", "NodeID": "ip-10-0-149-143.ec2.internal", "nodeClient": "rook-ceph/csi-rbdplugin-4z2wj", "controllerClient": "rook-ceph/csi-rbdplugin-provisioner-5794db6555-npwr7"}
1.6593560520878572e+09	INFO	Successfully completed reclaim space operation	{"controller": "reclaimspacejob", "controllerGroup": "csiaddons.openshift.io", "controllerKind": "ReclaimSpaceJob", "reclaimSpaceJob": {"name":"sample-1","namespace":"default"}, "namespace": "default", "name": "sample-1", "reconcileID": "dc87e88f-318a-40be-a87b-63151495d4d3", "PVCName": "rbd-pvc", "PVCNamespace": "default", "PVName": "pvc-82801af6-dccb-4323-a08c-743766b74028", "NodeID": "ip-10-0-149-143.ec2.internal", "nodeClient": "rook-ceph/csi-rbdplugin-4z2wj", "controllerClient": "rook-ceph/csi-rbdplugin-provisioner-5794db6555-npwr7"}

It is not easy compare times with other logs, the current situation is very user unfriendly.