fix(logClient.go):fix panic interface conversion: interface {} is nil not string

[xiao-jay]

fix #290

First

wrong code: https://github.com/kubearmor/kubearmor-client/blob/main/log/logClient.go#L304

func WatchTelemetryHelper(arr []byte, t string, o Options) {
	var res map[string]interface{}
	err := json.Unmarshal(arr, &res)
	if err != nil {
		return
	}

	// Filter Telemetry based on provided options
	if len(o.Selector) != 0 {
304		val := selectLabels(o, res["Labels"].(string))
		if val != nil {
			return
		}
	}

	if o.Namespace != "" {
		ns, ok := res["NamespaceName"].(string)
		if !ok {
			return
		}
		match := regexMatcher(CNamespace, ns)
		if !match {
			return
		}
	}

some time len(o.Selector) != 0 but res["Labels"] is nil, will lead to panic.

Second

if o.Selector match one label should select it ? so i use labels := strings.Split(res["Labels"].(string), ",") to split multiple labels.

[Shreyas220]

This PR solves two thing

1 Solves the panic issue

Adding a check res["Labels"] != nil before accessing res["Labels"].(string)

2 Multiple label

Before this if we had multiple labels , we would return nil,
by adding this we are separate the label and check

cc: @Ankurk99

LGTM 👍