Refactor kube package to use controller-runtime client instead of using kubectl CLI.

This allows to runt the tests faster

pkg/testhelper/kube/deployment.go

@@ -0,0 +1,45 @@
+package kube
+
+import (
+	"context"
+	"time"
+
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	//nolint:staticcheck // ST1001
+	. "github.com/onsi/ginkgo/v2"
+	//nolint:staticcheck // ST1001
+	. "github.com/onsi/gomega"
+	appsv1 "k8s.io/api/apps/v1"
+)
+
+type Deployment struct {
+	client client.Client
+	config *ClusterConfig
+	name   string
+}
+
+func (d *Deployment) ReadEnvVar(ctx context.Context, envVarName string) string {
+	By("Reading " + envVarName + " value from deployment/" + d.name)
+
+	// Derive a short-lived context so this API call won't hang indefinitely.
+	c, cancel := context.WithTimeout(ctx, 10*time.Second)
+	defer cancel()
+
+	deployment := &appsv1.Deployment{}
+	err := d.client.Get(c, client.ObjectKey{Name: d.name, Namespace: d.config.Namespace}, deployment)
+	Expect(err).ToNot(HaveOccurred())
+
+	// Search env across all containers
+	found := ""
+	for _, container := range deployment.Spec.Template.Spec.Containers {
+		for _, env := range container.Env {
+			if env.Name == envVarName && env.Value != "" {
+				found = env.Value
+				break
+			}
+		}
+	}
+
+	Expect(found).NotTo(BeEmpty())
+	return found
+}