Fix version checker job update errors with field is immutable

[prafull01]

Currently, In version checker job we reconcile the job and create the job if not present and update the job if there is some change in existing job. However updating the template of the job is not allowed and we get the "Field is immutable" error. I have fixed it by recreating the job instead of updating it.

logger.go:130: 2023-06-13T19:19:58.949Z	ERROR	failed to reconcile job only err	{"CrdbCluster": "crdb-test-r2rxl8/crdb", "ReconcileId": "KV8YKEQQG87NzA6RRU2PDU", "error": "Job.batch \"crdb-vcheck-28111399\" is invalid: spec.template: Invalid value: core.PodTemplateSpec{ObjectMeta:v1.ObjectMeta{Name:\"\", GenerateName:\"\", Namespace:\"\", SelfLink:\"\", UID:\"\", ResourceVersion:\"\", Generation:0, CreationTimestamp:time.Date(1, time.January, 1, 0, 0, 0, 0, time.UTC), DeletionTimestamp:<nil>, DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string{\"controller-uid\":\"12f420a3-94d6-4763-82d1-aee40a5610ea\", \"job-name\":\"crdb-vcheck-28111399\"}, Annotations:map[string]string(nil), OwnerReferences:[]v1.OwnerReference(nil), Finalizers:[]string(nil), ClusterName:\"\", ManagedFields:[]v1.ManagedFieldsEntry(nil)}, Spec:core.PodSpec{Volumes:[]core.Volume(nil), InitContainers:[]core.Container(nil), Containers:[]core.Container{core.Container{Name:\"crdb\", Image:\"nginx:latest\", Command:[]string{\"/bin/bash\"}, Args:[]string{\"-c\", \"set -eo pipefail; /cockroach/cockroach.sh version | grep 'Build Tag:'| awk '{print $3}'; sleep 150\"}, WorkingDir:\"\", Ports:[]core.ContainerPort(nil), EnvFrom:[]core.EnvFromSource(nil), Env:[]core.EnvVar(nil), Resources:core.ResourceRequirements{Limits:core.ResourceList{\"cpu\":resource.Quantity{i:resource.int64Amount{value:300, scale:-3}, d:resource.infDecAmount{Dec:(*inf.Dec)(nil)}, s:\"300m\", Format:\"DecimalSI\"}, \"memory\":resource.Quantity{i:resource.int64Amount{value:268435456, scale:0}, d:resource.infDecAmount{Dec:(*inf.Dec)(nil)}, s:\"\", Format:\"BinarySI\"}}, Requests:core.ResourceList{\"cpu\":resource.Quantity{i:resource.int64Amount{value:300, scale:-3}, d:resource.infDecAmount{Dec:(*inf.Dec)(nil)}, s:\"300m\", Format:\"DecimalSI\"}, \"memory\":resource.Quantity{i:resource.int64Amount{value:268435456, scale:0}, d:resource.infDecAmount{Dec:(*inf.Dec)(nil)}, s:\"\", Format:\"BinarySI\"}}}, VolumeMounts:[]core.VolumeMount(nil), VolumeDevices:[]core.VolumeDevice(nil), LivenessProbe:(*core.Probe)(nil), ReadinessProbe:(*core.Probe)(nil), StartupProbe:(*core.Probe)(nil), Lifecycle:(*core.Lifecycle)(nil), TerminationMessagePath:\"/dev/termination-log\", TerminationMessagePolicy:\"File\", ImagePullPolicy:\"IfNotPresent\", SecurityContext:(*core.SecurityContext)(nil), Stdin:false, StdinOnce:false, TTY:false}}, EphemeralContainers:[]core.EphemeralContainer(nil), RestartPolicy:\"Never\", TerminationGracePeriodSeconds:(*int64)(0xc00890f6e0), ActiveDeadlineSeconds:(*int64)(nil), DNSPolicy:\"ClusterFirst\", NodeSelector:map[string]string(nil), ServiceAccountName:\"crdb-sa\", AutomountServiceAccountToken:(*bool)(0xc00890f6e8), NodeName:\"\", SecurityContext:(*core.PodSecurityContext)(0xc0173fc800), ImagePullSecrets:[]core.LocalObjectReference(nil), Hostname:\"\", Subdomain:\"\", SetHostnameAsFQDN:(*bool)(nil), Affinity:(*core.Affinity)(nil), SchedulerName:\"default-scheduler\", Tolerations:[]core.Toleration(nil), HostAliases:[]core.HostAlias(nil), PriorityClassName:\"\", Priority:(*int32)(nil), PreemptionPolicy:(*core.PreemptionPolicy)(nil), DNSConfig:(*core.PodDNSConfig)(nil), ReadinessGates:[]core.PodReadinessGate(nil), RuntimeClassName:(*string)(nil), Overhead:core.ResourceList(nil), EnableServiceLinks:(*bool)(nil), TopologySpreadConstraints:[]core.TopologySpreadConstraint(nil), OS:(*core.PodOS)(nil)}}: field is immutable"}