scripts: Implemented the first E2E test.

Clientset instance can be used to connect to cluster, manage resources.
With clientset instance we can evaluate the posibility of moving other tests to OTE.

The reference to OTE framework:
https://docs.google.com/document/d/1cFZj9QdzW8hbHc3H0Nce-2xrJMtpDJrwAse9H7hLiWk/edit?tab=t.0#heading=h.8cf3f4eii1q8

Author: JianLi-RH

.openshift-tests-extension/openshift_payload_cluster-version-operator.json

@@ -1,6 +1,6 @@
 [
   {
-    "name": "[Jira:\"Cluster Version Operator\"] cluster-version-operator-tests should support passing tests",
+    "name": "[Jira:\"Cluster Version Operator\"] cluster-version-operator-tests should support passing tests the sanity test should pass",
     "labels": {},
     "resources": {
       "isolation": {}

cmd/cluster-version-operator-tests/README.md

@@ -4,16 +4,28 @@ It integrates [openshift-tests-extension](https://github.com/openshift-eng/opens
 cluster-version-operator which allows openshift components to contribute tests to openshift-tests' suites with
 extension binaries.
 
+## Build the executable binary
+In root folder, run below command to build executable binary:
+```console
+$ make build
+```
 
 ## Run the tests locally
 
-## Using the framework
+### Using the binary
+- run a test-suite
+```console
+$ _output/<OS>/<ARCH>/cluster-version-operator-tests run-suite <test suite name>
+```
+where test suites can be listed by `_output/<OS>/<ARCH>/cluster-version-operator-tests info`.
+
+- run a single test case
 ```console
-$ hack/build-go.sh
-$ _output/<OS>/<ARCH>/cluster-version-operator-tests run-suite cluster-version-operator
+$ _output/<OS>/<ARCH>/cluster-version-operator-tests run-test <test case name>
 ```
+where test names can be listed by `_output/<OS>/<ARCH>/cluster-version-operator-tests list`.
 
-## Using ginko-cli
+### Using ginko-cli
 
 After [installing-ginkgo](https://onsi.github.io/ginkgo/#installing-ginkgo):
 

test/utilities/connection.go

@@ -0,0 +1,37 @@
+package utilities
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+// getKubeClient creates a Kubernetes clientset.
+func getKubeClient() (*kubernetes.Clientset, error) {
+	configPath, present := os.LookupEnv("KUBECONFIG")
+	if !present {
+		return nil, errors.New("the environment variable KUBECONFIG must be set")
+	}
+	config, err := clientcmd.BuildConfigFromFlags("", configPath)
+	if err != nil {
+		return nil, fmt.Errorf("unable to load build config: %w", err)
+	}
+	// Create the Clientset
+	clientset, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		return nil, fmt.Errorf("unable to create a Kubernetes clientset: %w", err)
+	}
+	return clientset, nil
+}
+
+// MustGetKubeClient creates a Kubernetes clientset, or panics on failures.
+func MustGetKubeClient() *kubernetes.Clientset {
+	clientset, err := getKubeClient()
+	if err != nil {
+		panic("unable to create a Kubernetes clientset: " + err.Error())
+	}
+	return clientset
+}